Britain’s union began in 1707—and grew by war and finance
The United Kingdom’s story as a single state opens not with ancient kings but with 1707: England (including Wales) and Scotland fused under the Treaty and Acts of Union into Great Britain. Queen Anne became the first monarch of that new kingdom, while Scottish and English law, churches, and schools stayed separate.
On 1 May 1707 the two kingdoms and their parliaments merged. Early decades brought Jacobite risings that ended with Stuart defeat at Culloden in 1746. Victory in the Seven Years’ War (1763) enlarged a First British Empire; loss of the thirteen American colonies in the War of American Independence forced a rebuild toward Asia and Africa. French Revolution and Napoleonic wars (1793–1815) pushed British elites into coalitions that finally beat Napoleon; the 1800 Acts of Union folded the Kingdom of Ireland into a single realm with Great Britain.
George I arrived from Hanover in 1714 after Anne’s death; George II’s long partnership with Robert Walpole (often dated 1730–42, and widely treated as the first prime minister from 1721–42) steadied patronage politics and colonial growth, including Canada after France’s defeat. The South Sea Bubble of 1720—stock leaping from £130 toward £1,000 before collapse—showed how finance could shake the court; Walpole wound the scandal down. Victorian prosperity and free-trade reform followed a generally peaceful century from 1815 to 1914, led by figures such as Palmerston, Disraeli, Gladstone, and Salisbury.
After World War I, twenty-six Irish counties left in 1922 as the Irish Free State; Northern Ireland rejoined the UK a day later, and in 1927 the formal title became the United Kingdom of Great Britain and Northern Ireland. Post-1945 Labour built a welfare state and the National Health Service (1945–50); Suez in 1956 marked lost superpower status as colonies became Commonwealth members. Devolution later shifted power toward Scotland, Wales, and Northern Ireland; membership of the European Economic Community from 1973 ended with departure from the EU in 2020 after the 2016 referendum.
Source: History of the United Kingdom
