On 1 May 1707, the Kingdom of England and the Kingdom of Scotland were unified under the Acts of Union, creating the Kingdom of Great Britain. This marked a pivotal moment in British history, establishing a single parliament and laying the foundations for modern governance. The 18th century also witnessed the emergence of cabinet government, with Robert Walpole serving as the de facto first prime minister from 1721 to 1742, shaping the role of political leadership in the country.

During this period, a series of Jacobite uprisings aimed to replace the Protestant House of Hanover with the Catholic House of Stuart. These efforts culminated in the Battle of Culloden in 1746, where the Jacobites were decisively defeated. Following the battle, the Scottish Highlanders faced forced assimilation, and the feudal independence of clan chiefs was revoked, significantly altering the social structure of Scotland.

Britain’s imperial focus shifted overseas. The loss of the American colonies during the War of Independence redirected British ambitions toward Asia, particularly India. British merchants also played a central role in the Atlantic slave trade, transporting nearly 3.3 million African slaves between 1662 and 1807 to work primarily on Caribbean and North American plantations. Growing opposition from the abolitionist movement led Parliament to ban the trade in 1807 and slavery itself across the British Empire in 1833. Britain subsequently became a leading force in the global abolition movement, using diplomatic pressure and naval blockades to end the slave trade worldwide.