England
Union with Scotland

The political structure of the island changed in 1603, when the King of Scots, James VI, a kingdom which had been a long-time rival to English interests, inherited the throne of England as James I, thereby creating a personal union. He styled himself King of Great Britain, although this had no basis in English law. Under the auspices of James VI and I the Authorised King James Version of the Holy Bible was published in 1611. It was the standard version of the Bible read by most Protestant Christians for four hundred years until modern revisions were produced in the 20th century.

Based on conflicting political, religious and social positions, the English Civil War was fought between the supporters of Parliament and those of King Charles I, known colloquially as Roundheads and Cavaliers respectively. This was an interwoven part of the wider multifaceted Wars of the Three Kingdoms, involving Scotland and Ireland. The Parliamentarians were victorious, Charles I was executed and the kingdom replaced by the Commonwealth. Leader of the Parliament forces, Oliver Cromwell declared himself Lord Protector in 1653; a period of personal rule followed. After Cromwell's death and the resignation of his son Richard as Lord Protector, Charles II was invited to return as monarch in 1660, in a move called the Restoration. With the reopening of theatres, fine arts, literature and performing arts flourished throughout the Restoration of the "Merry Monarch" Charles II. After the Glorious Revolution of 1688, it was constitutionally established that King and Parliament should rule together, though Parliament would have the real power. This was established with the Bill of Rights in 1689. Among the statutes set down were that the law could only be made by Parliament and could not be suspended by the King, also that the King could not impose taxes or raise an army without the prior approval of Parliament. Also since that time, no British monarch has entered the House of Commons when it is sitting, which is annually commemorated at the State Opening of Parliament by the British monarch when the doors of the House of Commons are slammed in the face of the monarch's messenger, symbolising the rights of Parliament and its independence from the monarch. With the founding of the Royal Society in 1660, science was greatly encouraged.

In 1666 the Great Fire of London gutted the city of London, but it was rebuilt shortly afterward with many significant buildings designed by Sir Christopher Wren. By the mid-to-late 17th century, two political factions had emerged – the Tories and Whigs. Though the Tories initially supported Catholic king James II, some of them, along with the Whigs, during the Revolution of 1688 invited the Dutch Prince William of Orange to defeat James and become the king. Some English people, especially in the north, were Jacobites and continued to support James and his sons. Under the Stuart dynasty England expanded in trade, finance and prosperity. The Royal Navy developed Europe's largest merchant fleet. After the parliaments of England and Scotland agreed, the two countries joined in political union, to create the Kingdom of Great Britain in 1707. To accommodate the union, institutions such as the law and national churches of each remained separate.
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