The significance of the 1776 signing of the Declaration of Independence lies in its assertion of the American colonies' intent to break free from British rule and proclaim their sovereignty. Authored primarily by Thomas Jefferson, the document articulates core Enlightenment principles, emphasizing individual rights, liberty, and the belief in government accountability to the governed. The Declaration served both as a rallying cry for the revolution and as a foundational text for American democracy. It fundamentally shifted the political landscape, inspiring other nations and peoples seeking freedom and self-determination throughout history.