What foundational event occurred on July 4, 1776?

The foundational event that occurred on July 4, 1776, is the adoption of the Declaration of Independence. This declaration marked a pivotal moment in American history as it formally announced the thirteen colonies' intention to separate from British rule and establish themselves as independent states. Authored primarily by Thomas Jefferson, the document articulates the colonies' grievances against King George III and outlines the philosophical foundations of a government based on individual rights and the consent of the governed. The date of July 4th has since become a significant national holiday, celebrated as Independence Day in the United States, honoring the ideals of freedom and self-determination articulated in the Declaration.