The Declaration of Independence, adopted on July 4, 1776, was the key historical document outlining the grievances of the American Colonies against Britain. Drafted primarily by Thomas Jefferson, it articulated the colonies' desire for freedom and independence, enumerating the various abuses and injustices imposed by King George III and British rule. The document emphasized principles such as individual rights, equality, and the right to self-govern, serving as a foundational text for American democracy. It not only justified the colonies' rebellion but also inspired future movements for independence and civil rights across the globe.