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United States

About United States

The United States of America is a constitutional federal republic comprising fifty states and a federal district. The country is situated mostly in central North America, where its forty-eight contiguous states and Washington, D.C., the capital district, lie between the Pacific and Atlantic Oceans, bordered by Canada to the north and Mexico to the south. The state of Alaska is in the northwest of the continent, with Canada to its east and Russia to the west across the Bering Strait, and the state of Hawaii is an archipelago in the mid-Pacific. The United States also possesses several territories, or insular areas, scattered around the Caribbean and Pacific.

At 3.79 million square miles (9.83 million km²) and with over 300 million people, the United States is the third or fourth largest country by total area, and third largest by land area and by population. The United States is one of the world's most ethnically diverse nations, the product of large-scale immigration from many countries. The U.S. economy is the largest national economy in the world, with a nominal 2006 gross domestic product (GDP) of more than US$13 trillion (over 19% of the world total based on purchasing power parity).

The nation was founded by thirteen colonies of Great Britain located along the Atlantic seaboard. Proclaiming themselves "states," they issued the Declaration of Independence on July 4, 1776. The rebellious states defeated Great Britain in the American Revolutionary War, the first successful colonial war of independence. A federal convention adopted the current United States Constitution on September 17, 1787; its ratification the following year made the states part of a single republic. The Bill of Rights, comprising ten constitutional amendments, was ratified in 1791.

In the nineteenth century, the United States acquired land from France, Spain, Great Britain, Mexico, and Russia, and annexed the Republic of Texas and the Republic of Hawaii. Disputes between the agrarian South and industrial North over states' rights and the expansion of the institution of slavery provoked the American Civil War of the 1860s. The North's victory prevented a permanent split of the country and led to the end of slavery in the United States. The Spanish-American War and World War I confirmed the nation's status as a military power. In 1945, the United States emerged from World War II as the first country with nuclear weapons, a permanent member of the United Nations Security Council, and a founding member of NATO. In the post-Cold War era, the United States is the only remaining superpower »”accounting for approximately 50% of global military spending »”and a dominant economic, political, and cultural force in the world.

Etymology

The term America, for the lands of the western hemisphere, was coined in the early sixteenth century after Amerigo Vespucci, an Italian explorer and cartographer. The full name of the country was first used officially in the Declaration of Independence, which was the "unanimous Declaration of the thirteen united States of America" adopted by the "Representatives of the united States of America" on July 4, 1776. The current name was finalized on November 15, 1777, when the Second Continental Congress adopted the Articles of Confederation, the first of which states, "The Stile of this Confederacy shall be 'The United States of America.'" Common short forms and abbreviations of the United States of America include the United States, the U.S., the U.S.A., and America. Colloquial names for the country include the U.S. of A. and the States. Columbia, a once popular name for the Americas and the United States, was derived from Christopher Columbus. It appears in the name "District of Columbia". A female personification of Columbia appears on some official documents, including certain prints of U.S. currency.

The standard way to refer to a citizen of the United States is as an American. Though United States is the formal adjective, American and U.S. are the most common adjectives used to refer to the country ("American values," "U.S. forces"). American is rarely used in English to refer to people not connected to the United States.

The phrase "the United States" was originally treated as plural »”e.g, "the United States are" »”including in the Thirteenth Amendment to the Constitution, ratified in 1865. However, it became increasingly common to treat the name as singular »”e.g., "the United States is" »”after the end of the Civil War. The singular form is now standard, while the plural form is retained in the set idiom "these United States."

Geography

The United States is situated almost entirely in the western hemisphere: the contiguous United States stretches from the Pacific on the west to the Atlantic on the east, with the Gulf of Mexico to the southeast, and bordered by Canada on the north and Mexico on the south. Alaska is the largest state in area; separated from the contiguous U.S. by Canada, it touches the Pacific on the south and Arctic Ocean on the north. Hawaii occupies an archipelago in the central Pacific, southwest of North America. The United States is the world's third or fourth largest nation by total area, before or after China. The ranking varies depending on (a) how two territories disputed by China and India are counted and (b) how the total size of the United States is calculated: the CIA World Factbook gives 9,826,630 km², the United Nations Statistics Division gives 9,629,091 km², and the Encyclopedia Britannica gives 9,522,055 km². Including only land area, the United States is third in size behind Russia and China, just ahead of Canada. The United States also possesses several insular territories scattered around the West Indies (e.g., the commonwealth of Puerto Rico) and the Pacific (e.g., Guam).

The coastal plain of the Atlantic seaboard gives way further inland to deciduous forests and the rolling hills of the Piedmont. The Appalachian Mountains divide the eastern seaboard from the Great Lakes and the grasslands of the Midwest. The Mississippi-Missouri River, the world's fourth longest river system, runs mainly north-south through the heart of the country. The flat, fertile prairie land of the Great Plains stretches to the west. The Rocky Mountains, at the western edge of the Great Plains, extend north to south across the continental United States, reaching altitudes higher than 14,000 feet (4,300 m) in Colorado. The area to the west of the Rocky Mountains is dominated by the rocky Great Basin and deserts such as the Mojave. The Sierra Nevada range runs parallel to the Rockies, relatively close to the Pacific coast. At 20,320 feet (6,194 m), Alaska's Mount McKinley is the country's tallest peak. Active volcanoes are common throughout the Alexander and Aleutian Islands, and the entire state of Hawaii is built upon tropical volcanic islands. The supervolcano underlying Yellowstone National Park in the Rockies is the continent's largest volcanic feature.

Because of the United States' large size and wide range of geographic features, nearly every type of climate is represented. The climate is temperate in most areas, tropical in Hawaii and southern Florida, polar in Alaska, semi-arid in the Great Plains west of the 100th meridian, desert in the Southwest, Mediterranean in Coastal California, and arid in the Great Basin. Extreme weather is not uncommon »”the states bordering the Gulf of Mexico are prone to hurricanes, and most of the world's tornadoes occur within the continental United States, primarily in the Midwest.

Environment

U.S. plant life is very diverse; the country has more than 17,000 identified native species of flora. More than 400 mammal, 700 bird, 500 reptile and amphibian, and 90,000 insect species have been documented. The Endangered Species Act of 1973 protects threatened and endangered species and their habitats, which are monitored by the U.S. Fish and Wildlife Service.

The U.S. has fifty-eight national parks and hundreds of other federally managed parks, forests, and wilderness areas. Altogether, the U.S. government regulates 28.8% of the country's total land area. Most such public land comprises protected parks and forestland, though some federal land is leased for oil and gas drilling, mining, or cattle ranching.

The energy policy of the United States is widely debated; many call on the country to take a leading role in fighting global warming. The United States is currently the second largest emitter, after the People's Republic of China, of carbon dioxide from the burning of fossil fuels.

History

The indigenous peoples of the U.S. mainland, including Alaska Natives, are thought to have migrated from Asia. They began arriving at least 12,000 and as many as 40,000 years ago. Several indigenous communities in the pre-Columbian era developed advanced agriculture, grand architecture, and state-level societies. In 1492, Genoese explorer Christopher Columbus, under contract to the Spanish crown, reached several Caribbean islands, making first contact with the indigenous population. In the years that followed, the majority of the indigenous American peoples were killed by epidemics of Eurasian diseases.

On April 2, 1513, Spanish conquistador Juan Ponce de León landed on what he called "La Florida" »”the first documented European arrival on what would become the U.S. mainland. Of the colonies Spain established in the region, only St. Augustine, founded in 1565, remains. Later Spanish settlements in the present-day southwestern United States drew thousands through Mexico. French fur traders established outposts of New France around the Great Lakes; France eventually claimed much of the North American interior as far south as the Gulf of Mexico. The first successful English settlements were the Virginia Colony in Jamestown in 1607 and the Pilgrims' Plymouth Colony in 1620. The 1628 chartering of the Massachusetts Bay Colony resulted in a wave of migration; by 1634, New England had been settled by some 10,000 Puritans. Between the late 1610s and the American Revolution, an estimated 50,000 convicts were shipped to England's, and later Great Britain's, American colonies. Beginning in 1614, the Dutch established settlements along the lower Hudson River, including New Amsterdam on Manhattan Island. The small settlement of New Sweden, founded along the Delaware River in 1638, was taken over by the Dutch in 1655.

By 1674, English forces had won the former Dutch colonies in the Anglo-Dutch Wars; the province of New Netherland was renamed New York. Many new immigrants, especially to the South, were indentured servants »”some two-thirds of all Virginia immigrants between 1630 and 1680. By the turn of the century, slaves kidnapped from Africa were becoming the primary source of bonded labor. With the 1729 division of the Carolinas and the 1732 colonization of Georgia, the thirteen British colonies that would become the United States of America were established. All had active local and colonial governments with elections open to most free men, with a growing devotion to the ancient rights of Englishmen and a sense of self government that stimulated support for republicanism. All had legalized the African slave trade. With high birth rates, low death rates, and steady immigration, the colonies doubled in population every twenty-five years. The Christian revivalist movement of the 1730s and 1740s known as the Great Awakening fueled interest in both religion and religious liberty. In the French and Indian War, British forces seized Canada from the French, but the francophone population remained politically isolated from the southern colonies. By 1770, those thirteen colonies had an increasingly Anglicized population of three million, approximately half that of Britain. Though subject to British taxation, they were given no representation in the Parliament of Great Britain.

Tensions between American colonials and the British during the revolutionary period of the 1760s and early 1770s led to the American Revolutionary War, fought from 1775 through 1781. On June 14, 1775, the Continental Congress, convening in Philadelphia, established a Continental Army under the command of George Washington. Proclaiming that "all men are created equal" and endowed with "certain unalienable Rights," the Congress adopted the Declaration of Independence on July 4, 1776. The Declaration, drafted largely by Thomas Jefferson, pronounced the colonies sovereign "states." In 1777, the Articles of Confederation were adopted, uniting the states under a weak federal government that operated until 1788. Some 70,000-80,000 loyalists to the British Crown fled the rebellious states, many to Nova Scotia and the new British holdings in Canada. Native Americans, with divided allegiances, fought on both sides of the war's western front.

After the defeat of the British army by American forces who were assisted by the French, Great Britain recognized the sovereignty of the thirteen states in 1783. A constitutional convention was organized in 1787 by those who wished to establish a strong national government with power over the states. By June 1788, nine states had ratified the United States Constitution, sufficient to establish the new government; the republic's first Senate, House of Representatives, and president »”George Washington »”took office in 1789. New York City was the federal capital for a year, before the government relocated to Philadelphia. In 1791, the states ratified the Bill of Rights, ten amendments to the Constitution forbidding federal restriction of personal freedoms and guaranteeing a range of legal protections. Attitudes toward slavery were shifting; a clause in the Constitution protected the African slave trade only until 1808. The Northern states abolished slavery between 1780 and 1804, leaving the slave states of the South as defenders of the "peculiar institution." In 1800, the federal government moved to the newly founded Washington, D.C. The Second Great Awakening made evangelicalism a force behind various social reform movements.

London

About London

London (pronunciation (help·info); IPA: /'l?nd?n/) is the largest urban area and capital of England and the United Kingdom. At its core, the ancient City of London, to which the name historically belongs, still retains its limited mediaeval boundaries; but since at least the 19th century the name "London" has also referred to the whole metropolis which has developed around it. Today the bulk of this conurbation forms the London region of England and the Greater London administrative area, with its own elected mayor and assembly.

An important settlement for two millennia, London's history goes back to its founding by the Romans. Since its settlement, London has been the centre of many important movements and phenomena throughout history, such as the English Renaissance, the Industrial Revolution, and the Gothic Revival. In light of this, the city has become one of the most popular tourist destinations in the world, and its popularity has increased over the years due to the city's economic growth. London boasts four World Heritage Sites; these are Palace of Westminster, the Tower of London, the historic settlement of Greenwich, and the Royal Botanic Gardens, Kew. It is one of the world's leading business, financial, and cultural centres, and its influence in politics, education, entertainment, media, fashion and the arts all contribute to its status as a major global city.

London has an official population of 7,512,400 (as of mid-2006) within the boundaries of Greater London and is the most populous municipality in the European Union. The urban area of London extends beyond the limits of Greater London and has a population of 8,278,251 (as of 2001). The metropolitan area is estimated to have a population of between 12 and 14 million. London's diverse population draws from a wide range of peoples, cultures, and religions, and over 300 different languages are spoken within the city. It is an international transport hub, with five major international airports serving the area and a large port. It serves as the largest aviation hub in the world, and the multi-terminal Heathrow Airport carries more international passengers than any other airport in the world.

Geography

London can be defined in a number of different ways. At London's core is the small, ancient City of London which is commonly known as 'the City' or 'Square Mile'. London's metropolitan area grew considerably during the Victorian era and again during the Interwar period, but expansion halted in the 1940s because of World War II and Green Belt legislation, and the area has been largely static since. The London region of England, also commonly known as Greater London, is the area administered by the Greater London Authority. The urban sprawl of the conurbation »”or Greater London Urban Area »”covers a roughly similar area, with a slightly larger population. Beyond this is the vast London commuter belt.

Forty percent of Greater London is covered by the London postal district, within which 'LONDON' forms part of the postal address. The London telephone area code covers a larger area, similar in size to Greater London, although some outer districts are omitted and some places just outside are included. The area within the orbital M25 motorway is sometimes used to define the "London area" and the Greater London boundary has been aligned to it in places. Greater London is split for some purposes into Inner London and Outer London. Informally, the city is split into North, South, East, West and often also Central London.

The Metropolitan Police District, city-wide local government area and London transport area have varied over time, but currently broadly coincide with the Greater London boundary. The Romans may have marked the centre of Londinium with the London Stone, still visible on Cannon Street. The coordinates of the nominal centre of London (traditionally considered to be the original Eleanor Cross at Charing Cross, near the junction of Trafalgar Square and Whitehall) are approximately 51°30 »²29 »³N, 00°07 »²29 »³W. Trafalgar Square has also become a central point for celebrations and protests.

Within London, both the City of London and the City of Westminster have City status and both the City of London and the remainder of Greater London are ceremonial counties. The current area of Greater London was historically part of the counties of Middlesex, Kent, Surrey, Essex and Hertfordshire. Unlike most capital cities, London's status as the capital of the UK has never been granted or confirmed officially »”by statute or in written form. Its position as the capital has formed through constitutional convention, making its position as de facto capital a part of the UK's unwritten constitution. The capital of England was moved to London from Winchester as the Palace of Westminster developed in the 12th and 13th centuries to become the permanent location of the royal court, and thus the political capital of the nation.

According to the dictionary definition of 'the seat of government', London is not the capital of England, as England does not have its own government, however according to the wider dictionary definition of, 'the most important town...' and many other authorities London is properly considered the capital of England.

Greater London covers an area of 609 square miles (1,579 km²), making it the 37th largest urban area in the world. Its primary geographical feature is the Thames, a navigable river which crosses the city from the south-west to the east. The Thames Valley is a floodplain surrounded by gently rolling hills such as Parliament Hill, Addington Hills, and Primrose Hill. These hills presented no significant obstacle to the growth of London from its origins as a port on the north side of the river, and therefore London is roughly circular. Many of the highest points in London are located in the suburbs or on the boundaries with adjacent counties.

The Thames was once a much broader, shallower river with extensive marshlands; at high tide, its shores reached five times their current width. Since the Victorian era It has been extensively embanked, and many of its London tributaries now flow underground. The Thames is a tidal river, and London is vulnerable to flooding. The threat has increased over time due to a slow but continuous rise in high water level by the slow 'tilting' of Britain (up in the north and down in the south) caused by post-glacial rebound. In 1974, a decade of work began on the construction of the Thames Barrier across the Thames at Woolwich to deal with this threat. While the barrier is expected to function as designed until roughly 2030, concepts for its future enlargement or redesign are already being discussed.

London has a temperate marine climate, like much of the British Isles, with regular but generally light precipitation throughout the year »”unlike the rest of the UK and even the nearby coast. The warmest month is July, with an average temperature range at Greenwich of 13.6 °C to 22.8 °C (56.5 to 73.0 °F). Record high temperatures of up to 38.1 °C (101 °F) were recorded in different parts of London on 10 August 2003. The coolest month is January, averaging 2.4 °C to 7.9 °C (35.6 to 46.2 °F). Average annual precipitation is 583.6 mm (22.98 in), with February on average the driest month. Snow is relatively uncommon, particularly because heat from the urban area can make London up to 5 °C (9 °F) hotter than the surrounding areas in winter. Light snowfall, however, is generally seen a few times every year. London is in USDA Hardiness zone 9, and AHS Heat Zone 2.

London's vast urban area is often described using a set of district names (e.g. Bloomsbury, Knightsbridge, Mayfair, Whitechapel, Fitzrovia). These are either informal designations, or reflect the names of superseded parishes and city wards. Such names have remained in use through tradition, each referring to a neighbourhood with its own distinctive character, but often with no modern official boundaries. Since 1965 Greater London has been divided into 32 London boroughs in addition to the ancient City of London.

London is one of the world's three largest financial centres (alongside New York and Tokyo) with a dominant role in several international financial markets, including cross-border bank lending, international bond issuance and trading, foreign-exchange trading, over-the-counter derivatives, fund management and foreign equities trading. It also has the world's largest insurance market, the leading exchange for dealing in non-precious metals, the largest spot gold and gold lending markets, the largest ship broking market, and more foreign banks and investment houses than any other centre. The City has its own governance and boundaries, giving it a status as the only completely autonomous local authority in London. London's new financial and commercial hub is the Docklands area to the east of the City, dominated by the Canary Wharf complex. Other businesses locate in the City of Westminster, the home of the UK's national government and the famous Westminster Abbey.

The West End is London's main entertainment and shopping district, with locations such as Oxford Street, Leicester Square, Covent Garden and Piccadilly Circus acting as tourist magnets. The West London area is known for fashionable and expensive residential areas such as Notting Hill, Knightsbridge and Chelsea »”where properties can sell for tens of millions of pounds. The average price for all properties in the Royal Borough of Kensington and Chelsea is £894,000 with similar average outlay in most of Central London.

The eastern side of London contains the East End and East London. The East End is the area closest to the original Port of London, known for its high immigrant population, as well as for being one of the poorest areas in London. The surrounding East London area saw much of London's early industrial development; now, brownfield sites throughout the area are being redeveloped as part of the Thames Gateway including the London Riverside and Lower Lea Valley, which is being developed into the Olympic Park for the 2012 Olympics.

London is too diverse to be overwhelmingly characterised by any particular architectural style, having accumulated its buildings over a long period of time and drawn on an inexhaustible range of influences. It is, however, mainly brick built, most commonly the yellow London stock brick or a warm orange-red variety, often decorated with carvings and white plaster mouldings. Many grand houses and public buildings (such as the National Gallery) are constructed from Portland stone. Some areas of the city, particularly those just west of the centre, are characterised by white stucco or whitewashed buildings. Few structures pre-date the Great Fire of 1666, except for a few trace Roman remains, the Tower of London and a few scattered Tudor survivors in the City. A majority of buildings in London date from the Edwardian or Victorian periods. The disused (but soon to be rejuvenated) 1939 Battersea Power Station by the river in the south-west is a local landmark, while some railway termini are excellent examples of Victorian architecture, most notably St Pancras and Paddington (at least internally).

The density of London varies, with high employment density in the central area, high residential densities in inner London and lower densities in the suburbs. In the dense areas, most of the concentration is achieved with medium-rise and high-rise buildings. London's skyscrapers such as the famous "Gherkin", Tower 42 and One Canada Square are usually found in the two financial districts, the City of London and Canary Wharf. Other notable modern buildings include City Hall in Southwark with its distinctive oval shape, the British Library in Somers Town/Kings Cross, and the Great Court of the British Museum. What was formerly the Millennium Dome, located by the Thames to the east of Canary Wharf, is now used as an entertainment venue known as The O2 Arena.

In recent years, the development of tall buildings has been encouraged in the London Plan, which will lead to the erection of many new skyscrapers over the next decade, particularly in the City of London and Canary Wharf. The 72-storey, 1017-foot (310 m) "Shard London Bridge" by London Bridge station, the 945-foot (288 m) Bishopsgate Tower and around 20 other skyscrapers over 500 feet (150 m) are either proposed or approved and could transform the city's skyline.

A great many monuments pay homage to people and events in the city. The Monument in the City of London provides views of the surrounding area while commemorating the Great Fire of London, which originated nearby. Marble Arch and Wellington Arch, at the north and south ends of Park Lane respectively, have royal connections, as do the Albert Memorial and Royal Albert Hall in Kensington. Nelson's Column is a nationally-recognised monument in Trafalgar Square, one of the focal points of the centre.

Often called "The Green City," London has a number of open spaces. The largest of these in the central area are the Royal Parks of Hyde Park and its neighbour Kensington Gardens at the western edge of central London and Regent's Park on the northern edge. This park is located near the tourist attractions of Baker Street, where the fictional Sherlock Holmes lived, and Madame Tussauds Wax Museum. Closer to central London are the smaller Royal Parks of Green Park and St. James's Park. Hyde Park in particular is popular for sports and sometimes hosts open-air concerts.

A number of large parks lie outside the city centre, including the remaining Royal Parks of Greenwich Park to the south-east, Bushy Park and Richmond Park to the south-west and Victoria Park, East London to the east. Primrose Hill to the north of Regent's Park is a popular spot to view the city skyline. Some more informal, semi-natural open spaces also exist, including the 791-acre (3.2 km²) Hampstead Heath of North London. This incorporates Kenwood House, the former stately home and a popular location in the summer months where classical music concerts are held by the lake, attracting thousands of people every weekend to enjoy the music, scenery and fireworks. In the extreme South East of Greater London, the London Boroughs of Bexley and Bromley are noted for their open spaces and extensive wooded areas.

History

The etymology of London remains unclear. The earliest mention of the city's toponym can be attributed to Geoffrey of Monmouth in Historia Regum Britanniae. The name is described as originating from King Lud in which he had allegedly taken over the city and named it after himself to Kaerlud. This was then eventually slurred into Kaerludein and finally London. Few modern sources support this theory. Many other theories have been advanced over the centuries, mostly deriving it from Welsh or British, but occasionally from Anglo-Saxon or even Hebrew.

In 1998 Richard Coates, a linguistics professor now at the University of the West of England criticised both these suggestions on linguistic grounds, and proposed his own argument that the name derives from the pre-Celtic *plowonida, which roughly means "a river too wide to ford". He suggested that the part of Thames at London was given this name, and then when a settlement was established, the inhabitants added the suffix -on or -onjon to the name for the settlement. Proto-Indo-European *p was regularly lost in proto-Celtic, and through linguistic change, the name developed from Plowonidonjon to Lundonjon, then contracted to Lundein or Lundyn, Latinised to Londinium, and finally borrowed by the Anglo-Saxons as Lundene.

United Kingdom

About United Kingdom

The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom, the UK, or Britain, is a sovereign island country located off the northwestern coast of mainland Europe. The United Kingdom is a political union comprising of England, Northern Ireland, Scotland and Wales (sometimes referred to as the four "constituent countries" of the United Kingdom) and includes the island of Great Britain, the northeast part of the island of Ireland and many small islands. Northern Ireland is the only part of the UK with a land border, sharing it with the Republic of Ireland. Apart from this land border, the UK is surrounded by the Atlantic Ocean, the North Sea, the English Channel and the Irish Sea. The largest island, Great Britain, is linked to France by the Channel Tunnel.

The United Kingdom is a parliamentary democracy with its seat of government in London, the capital. It is a constitutional monarchy with Her Majesty Queen Elizabeth II the head of state. The Crown Dependencies of the Channel Islands and the Isle of Man, formally possessions of the Crown, are not part of the UK but form a federacy with it. The UK has fourteen overseas territories, all remnants of the British Empire, which at its height encompassed almost a quarter of the world's land surface, making it the largest empire in history. As a direct result of the empire, British influence can be observed in the language and culture of states such as Canada, Australia, New Zealand, India, South Africa, and the United States of America, and other less globally influential independent states. HM Queen Elizabeth II remains the head of the Commonwealth of Nations and head of state of the Commonwealth realms. The UK is a developed country, with the fifth (nominal GDP) or sixth (PPP) largest economy in the world.

The UK was the world's foremost power during the 19th and early 20th century, but the economic cost of two world wars and the decline of its empire in the latter half of the 20th century diminished its leading role in global affairs. The UK nevertheless retains strong economic, cultural, military and political influence and is a nuclear power, with the second or third (depending on method of calculation) highest defence spending in the world. It holds a permanent seat on the United Nations Security Council, and is a member of the G8, NATO, the European Union and the Commonwealth of Nations.

History

England and Scotland had existed as separate sovereign and independent states with their own monarchs and political structures since the 9th century. The once independent Principality of Wales fell under the control of English monarchs from the Statute of Rhuddlan in 1284, but was only formally annexed or "united" with England under the two Laws in Wales Acts of 1535 and 1542. Though the Scottish King, James VI, became King of England as well in 1603, thereby creating a personal union between the kingdoms, England (including Wales) and Scotland remained separate countries until the Treaty of Union was agreed a century later and put into effect by the Acts of Union 1707. The Acts of Union, passed by the Parliaments of England and Scotland respectively, created a political union in the form of a united Kingdom of Great Britain. The Act of Union 1800 united the Kingdom of Great Britain with the Kingdom of Ireland, which had been gradually brought under English control between 1541 and 1691, to form the United Kingdom of Great Britain and Ireland in 1801.

Over the next century the United Kingdom played an important role in developing Western ideas of parliamentary democracy as well as making significant contributions to literature, the arts and science. The UK-led Industrial Revolution transformed the country and fuelled the British Empire. During this time, like other Great Powers, the UK was involved in colonial exploitation, including the slave trade, though the passing of the 1807 Slave Trade Act made the UK the first country to prohibit trade in slaves.

After the defeat of Napoleon in the Napoleonic Wars, Britain became the principal naval power of the 19th century. At its peak the British Empire controlled large amounts of territory in Asia, Africa, Oceania and America.

At the end of the Victorian era the United Kingdom lost its industrial leadership, particularly to the German Empire, which surpassed the UK in industrial production and trade in the 1890s, and to the United States. Britain remained an eminent power and its empire expanded to its maximum size by 1921, gaining the League of Nations mandate over former German and Ottoman colonies after World War I.

Long simmering tensions in Ireland led to the partition of the island in 1920, followed by independence for the Irish Free State in 1922. Six of the nine counties of the province of Ulster remained within the UK, which then changed to the current name in 1927 of the United Kingdom of Great Britain and Northern Ireland.

After World War I, the world's first large-scale international broadcasting network, the BBC, was created. In 1924 the country's Labour movement, which had been gaining strength since the late 1890s, formed the first Labour government. Britain fought Nazi Germany in World War II, with its Commonwealth allies including Canada, Australia, New Zealand, South Africa and India, later to be joined by further allies such as the United States. Wartime leader Winston Churchill and his peacetime successor Clement Atlee helped plan the post-war world as part of the "Big Three". World War II left the United Kingdom financially damaged. Loans taken out during and after World War II from both Canada and the United States were economically costly but, along with post-war Marshall aid, the UK began the road to recovery.

The immediate post-war years saw the establishment of the British Welfare State and one of the world's first and most comprehensive public health services, while the demands of a recovering economy brought people from all over the Commonwealth to create a multiethnic Britain. Although the new post-war limits of Britain's political role were confirmed by the Suez Crisis of 1956, the international spread of the language meant the continuing impact of its literature and culture, while at the same time from the 1960s its popular culture found influence abroad. Following a period of economic stagnation and industrial strife in the 1970s after a global economic downturn, the 1980s saw the inflow of substantial oil revenues, and the premiership of Margaret Thatcher, under whom there was a marked break with the post-war political and economic consensus. Her supporters credit her with economic success, but her critics blame her for greater social division. From 1997 onward, these trends of growth largely continued under the leadership of Tony Blair.

The United Kingdom was one of the 12 founding members of the European Union at its launch in 1992 with the signing of the Treaty on European Union. Prior to that, it had been a member of the EU's forerunner, the European Economic Community (EEC), from 1973. The attitude of the present Labour government towards further integration with this organisation is mixed, with the Conservative Party favouring a return of some powers and competencies to the state, and the Liberal Democrats supportive of current engagement.

The end of the 20th century witnessed a major change to the government of the United Kingdom with devolution to Scotland and Wales taking effect in 1999. The creation of the devolved Scottish parliament in particular, with powers to legislate over a wide range of issues, is beginning to add to differences between the constituent countries of the United Kingdom. It has brought to the fore the so-called West Lothian question which is a complaint that devolution for Scotland and Wales but not England has created a situation where MPs in the UK parliament can vote on matters affecting England alone but on those same matters Scotland and Wales can make their own decisions. In 2007, the Scottish National Party (SNP) won the Scottish parliament elections and formed a minority government. New First Minister, Alex Salmond, hopes to hold a referendum on Scottish Independence before 2011, though the SNP may be unable to get a Bill to hold such a referendum approved by the Scottish parliament due to the minority position of the SNP government. If a referendum is held, an opinion poll in April 2008 suggested the result could be close as support for independence had reached 41% with just 40% supporting retention of the Union. The response of the unionist parties has been to call for the establishment of a Commission to examine further devolution of powers,a position that has the support of the Prime Minister.

Government and politics

The United Kingdom is a constitutional monarchy with Her Majesty Queen Elizabeth II of the United Kingdom of Great Britain and Northern Ireland, as head of state; the monarch of the UK serves as head of state of fifteen other Commonwealth countries, putting the UK in a personal union with those other states. The Crown has sovereignty over the Isle of Man and the Bailiwicks of Jersey and Guernsey. Collectively, these three territories are known as the Crown dependencies, lands owned by the British monarch but not part of the United Kingdom. They are not part of the European Union. However, the Parliament of the United Kingdom has the authority to legislate for the dependencies, and the British government manages their foreign affairs and defence.

The UK has fourteen overseas territories around the world, the last remaining territories of the British Empire. The overseas territories are not considered part of the UK, but in most cases, the local populations have British citizenship and the right of abode in the UK. This has been the case since 2002.

The UK has a parliamentary government based on strong democratic traditions: the Westminster system has been emulated around the world  »” a legacy of the British Empire.

The UK's constitution governs the legal framework of the country and consists mostly of written sources, including statutes, judge made case law, and international treaties. As there is no technical difference between ordinary statutes and law considered to be "constitutional law," the British Parliament can perform "constitutional reform" simply by passing Acts of Parliament and thus has the power to change or abolish almost any written or unwritten element of the constitution. However, no Parliament can pass laws that future Parliaments cannot change. The United Kingdom is one of the three countries in the world today that does not have a codified constitution (the other two being New Zealand and Israel).

The position of Prime Minister, the UK's head of government, belongs to the current leader of the political party that can obtain the confidence of a plurality in the House of Commons. The Prime Minister and their Cabinet are formally appointed by the Monarch to form Her Majesty's Government. However, the Prime Minister chooses the Cabinet, and by convention, HM The Queen respects the Prime Minister's choices. The Cabinet is traditionally drawn from members of the Prime Minister's party in both legislative houses, and mostly from the House of Commons, to which they are responsible. Executive power is exercised by the Prime Minister and Cabinet, all of whom are sworn into Her Majesty's Most Honourable Privy Council, and become Ministers of the Crown. The Rt Hon Gordon Brown MP, leader of the Labour Party, has been Prime Minister, First Lord of the Treasury and Minister for the Civil Service since 27 June 2007.

The Parliament of the United Kingdom that meets in the Palace of Westminster, is the ultimate legislative authority in the United Kingdom. A devolved parliament in Scotland and devolved assemblies in Northern Ireland, and Wales were established following public approval as expressed in referenda, but according to the doctrine of parliamentary sovereignty, these could be abolished by the UK parliament. The UK parliament is made up of two houses: an elected House of Commons and an appointed House of Lords, and any Bill passed requires the assent of HM The Queen to become law. For elections to the House of Commons, the UK is divided into 646 constituencies, with 529 in England, 18 in Northern Ireland, 59 in Scotland and 40 in Wales. Each constituency elects one Member of Parliament by simple plurality. General Elections are called by the Monarch when the Prime Minister so advises. Though there is no minimum term for a Parliament, a new election must be called within five years of the previous general election.

Questions over sovereignty have been brought forward due to the UK's membership of the European Union.

The UK's three major political parties are the Labour Party, the Conservative Party, and the Liberal Democrats, winning between them 616 out of the 646 seats available in the House of Commons at the 2005 General Election. Most of the remaining seats were won by parties that only contest elections in one part of the UK such as the Scottish National Party (Scotland only), Plaid Cymru (Wales only), and the Democratic Unionist Party, Social Democratic and Labour Party, Ulster Unionist Party, and Sinn Féin (Northern Ireland only, though Sinn Féin also contests elections in Ireland). In accordance with party policy, no elected Sinn Féin Member of Parliament has ever attended the House of Commons to speak in the House on behalf of their constituents as Members of Parliament are required to take an oath of allegiance to the Monarch. However, the current five Sinn Féin MPs have since 2002 made use of the offices and other facilities available at Westminster.

Northern Ireland, Scotland and Wales each has a devolved, unicameral legislature and its own government or Executive, led by a First Minister. England, despite being the largest country of the United Kingdom, has no devolved executive or legislature and is ruled and legislated for directly by the UK government and parliament. This situation has given rise to the so-called West Lothian question which concerns the fact that MPs from Northern Ireland, Scotland and Wales help decide the laws that apply to England alone.

The Scottish Parliament has wide ranging legislative powers over any matter that has not been specifically 'reserved' to the UK parliament, including education, healthcare, Scots law and local government. Following the 2007 elections, Alex Salmond, leader of the Scottish National Party, became First Minister of Scotland as head of a minority SNP government. The pro-union parties have responded to the electoral success of the SNP by creating a commission to examine the case for devolving additional powers while excluding Scottish independence as an option.

The National Assembly for Wales has more limited devolved powers than those devolved to Scotland though it may move towards additional powers in the near future. The Northern Ireland Assembly has powers closer to those already devolved to Scotland.

Each country of the United Kingdom is subdivided for the purposes of local government. In addition, for more ceremonial purposes, HM The Queen appoints a Lord-Lieutenant as her personal representative in lieutenancy areas across the UK. City status, which is governed by Royal Charter, can also be conferred separate from local government arrangements. Though there are sixty-six cities in the UK - fifty in England; six in Scotland; five in Wales; and five in Northern Ireland - a number of these do not form separate local government units.

The upper-tier subdivisions of England, are the nine intermediate-level Government Office Regions. Each region is made up of counties and unitary authority areas, apart from London, which consists of 32 London boroughs. London voted in favour of having a directly elected assembly in 1998 and it was intended that other regions would also be given their own elected regional assemblies, but a rejection by a referendum in 2004 of a proposed assembly in the North East region stopped this idea in its tracks. Below the region level and excluding London, England either has county councils and district councils or unitary authorities.

Northern Ireland is presently divided into 26 districts for local government purposes though these councils do not carry out the same range of functions as would be the case in the rest of the United Kingdom. However, on 13 March 2008, the Executive agreed on proposals to create 11 new councils to replace the present system.

Scotland is divided into 32 council areas with wide variation in both size and population. The cities of Glasgow, Edinburgh, Aberdeen and Dundee are separate council areas as also is Highland Council which includes a third of Scotland's area but just over 200,000 people. The power invested in local authorities is administered by elected councillors, of which there are currently 1,222 who are each paid a part-time salary. Elections are conducted by Single Transferable Vote in multi-member wards that elect either three or four councillors. Each council elects a Provost or Convenor to chair meetings of the council and to act as a figurehead for the area.

Local government in Wales consists of 22 unitary authorities, including the cities of Cardiff, Swansea and Newport which are separate unitary authorities in their own right.

Foreign relations and armed forces

The United Kingdom is a permanent member of the United Nations Security Council, a member of the G8 and NATO, and a member state of the European Union. The UK has a "Special Relationship" with the United States. Apart from the US and Europe, Britain's close allies include Commonwealth nations, Ireland and other English speaking countries. Britain's global presence and influence is further amplified through its trading relations and its armed forces, which maintain approximately eighty military installations and other deployments around the globe.

The Army, Navy and Air Force are collectively known as the British Armed Forces (or Her Majesty's Armed Forces) and officially the Armed Forces of the Crown. The commander-in-chief is the monarch, HM Queen Elizabeth II and they are managed by the Ministry of Defence. The armed forces are controlled by the Defence Council, chaired by the Chief of the Defence Staff.

The United Kingdom fields one of the most technologically advanced and best trained armed forces in the world. According to various sources, including the Ministry of Defence, the UK has the second highest military expenditure in the world, despite only having the 27th largest military in terms of manpower. Total defence spending currently accounts for 2.2% of total national GDP, compared to 4.4% at the end of the Cold War. It is the second largest spender on military science, engineering and technology. The Royal Navy is considered to be the only other blue-water navy along with those of France and the United States. The British Armed Forces are equipped with advanced weapons systems, including the Challenger 2 tank and the Eurofighter Typhoon jet fighter. The Ministry of Defence confirmed the acquisition of two new super carrier sized aircraft carriers on 25 July 2007.

The United Kingdom is one of the five recognised countries possessing nuclear weapons, utilising the Vanguard class submarine-based Trident II ballistic missile system.

The British Armed Forces are charged with protecting the United Kingdom and its overseas territories, promoting the United Kingdom's global security interests, and supporting international peacekeeping efforts. They are active and regular participants in NATO, including the Allied Rapid Reaction Corps, as well as the Five Power Defence Arrangements and other worldwide coalition operations. Overseas garrisons and facilities are maintained at Ascension Island, Belize, Brunei, Canada, Diego Garcia, the Falkland Islands, Germany, Gibraltar, Kenya, and Cyprus.

The British Army had a reported strength of 102,440 in 2005, the Royal Air Force a strength of 49,210 and the 36,320-strong Royal Navy, which includes the Royal Marines, who provide commando units specialising in amphibious warfare.

The United Kingdom Special Forces, provide troops trained for quick, mobile, military responses in counter-terrorism, land, maritime and amphibious operations, often where secrecy or covert tactics are required.