In the 18th century England, and after 1707 Great Britain, rose to become the world's dominant colonial power, with France as its main rival on the imperial stage. The pre-1707 English overseas possessions became the nucleus of the First British Empire.

"In 1714 the ruling class was so bitterly divided that many feared a civil war might break out on Queen Anne's death", wrote historian W. A. Speck. A few hundred of the richest ruling class and landed gentry families controlled parliament, but were deeply split, with Tories committed to the legitimacy of the Stuart "Old Pretender", then in exile. The Whigs strongly supported the Hanoverians, in order to ensure a Protestant succession. The new king, George I was a foreign prince and had a small English standing army to support him, with military support from his native Hanover and from his allies in the Netherlands. In the Jacobite rising of 1715, based in Scotland, the Earl of Mar led eighteen Jacobite peers and 10,000 men, with the aim of overthrowing the new king and restoring the Stuarts. Poorly organised, it was decisively defeated. The Whigs came to power, under the leadership of James Stanhope, Charles Townshend, the Earl of Sunderland, and Robert Walpole. Many Tories were driven out of national and local government, and new laws were passed to impose greater national control. The right of habeas corpus was restricted; to reduce electoral instability, the Septennial Act 1715 increased the maximum life of a parliament from three years to seven.