ChronoFive
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Setting the scene
The Acts of Union 1707 united the Kingdom of England (which had included Wales since 1536) and the Kingdom of Scotland into the Kingdom of Great Britain. The union resulted from a century of shared monarchy—since James VI of Scotland became James I of England in 1603, the crowns had been united but the kingdoms remained separate with their own parliaments, laws, and churches. By 1700, union was driven by practical concerns: Scotland's failed Darien colony (1698-1700) had bankrupted the Scottish elite, who sought access to English markets and colonial trade.
What happened
England, engaged in the War of Spanish Succession, feared Scotland might choose a different monarch after Queen Anne (the last Stuart) died, potentially allying with France. The English Parliament passed the Alien Act (1705), threatening to treat Scots as foreigners and embargo Scottish trade unless Scotland negotiated union. Scottish commissioners, many bribed with English money, negotiated terms in 1706. The Scottish Parliament, despite widespread popular opposition and riots, approved the treaty in January 1707 by 110 votes to 69.
Why it still matters
The Acts took effect May 1, 1707, dissolving both parliaments and creating a new Parliament of Great Britain at Westminster, with 45 Scottish MPs and 16 Scottish peers in the Lords. Scotland kept its separate legal system, church, and education. The union was initially unpopular in Scotland—seen as a sell-out by the elite—but over time created the British state that built an empire. The union remains controversial, with Scottish nationalism leading to a 2014 independence referendum (which failed) and ongoing debates. The 1707 union created the political entity that would become the United Kingdom in 1801.
Background
A single kingdom faced shared imperial challenges. Even centuries later, this episode remains a reference point for how empires rise, fracture, and transform.