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1776American Declaration of Independence
Thirteen colonies formally told Britain to get lost.
On July 4, 1776, representatives from thirteen American colonies voted to break away from British rule, producing a document that announced their independence and explained why. Written mainly by Thomas Jefferson, it asserted that people have natural rights and governments need the consent of the governed. The declaration didn't end the war immediately-that took until 1783-but it transformed a colonial rebellion into a revolution backed by political philosophy, and its language about human equality became influential far beyond America.