United Kingdom the Great Britain, the dominant industrial and maritime power of the 19th century, played a leading role in developing parliamentary democracy and in advancing literature and science. At its zenith, the British Empire stretched over one-fourth of the earth's surface. The first half of the 20th century saw the UK's strength seriously depleted in two World Wars. The second half witnessed the dismantling of the Empire and the UK rebuilding itself into a modern and prosperous European nation.

The UK currently is weighing the degree of its integration with continental Europe. A member of the EU, it chose to remain outside of the EMU for the time being. Constitutional reform is also a significant issue in the UK. Regional assemblies with varying degrees of power opened in Scotland, Wales, and Northern Ireland in 1999.

The UK, a leading trading power and financial center, deploys an essentially capitalistic economy, one of the quartet of trillion dollar economies of Western Europe. Over the past two decades the government has greatly reduced public ownership and contained the growth of social welfare programs. Agriculture is intensive, highly mechanized, and efficient by European standards, producing about 60% of food needs with only 1% of the labor force.

The UK has large coal, natural gas, and oil reserves; primary energy production accounts for 10% of GDP, one of the highest shares of any industrial nation. Services, particularly banking, insurance, and business services, account by far for the largest proportion of GDP while industry continues to decline in importance.