Religion was a major cause of the English Civil War. It was part of a Europe wide conflict between Roman Catholicism and Protestantism. At the start of his reign (1625) King Charles I had married the Roman Catholic Henrietta Maria of France.
The English Civil War (1642–1651) was a series of armed conflicts and political machinations between Parliamentarians ("Roundheads") and Royalists ("Cavaliers") over, principally, the manner of England's governance. ... The war ended with the Parliamentarian victory at the Battle of Worcester on 3 September 1651.
A common explanation is that the Civil War was fought over the moral issue of slavery. In fact, it was the economics of slavery and political control of that system that was central to the conflict.
