The Declaration of Independence is a historic document adopted by the Second Continental Congress on July 4, 1776. It announced the thirteen American colonies' decision to break away from British rule. The document outlines the colonies' grievances against King George III and emphasizes the principles of individual rights and government by consent. Written primarily by Thomas Jefferson, the Declaration asserts that all people are created equal and have the right to life, liberty, and the pursuit of happiness. It served as a foundation for the United States' values and inspired other nations seeking independence and democratic governance.