"The Declaration of Independence of The United States of America" by Thomas Jefferson is a founding document adopted in 1776. Written primarily by Jefferson between June 11 and June 28, it formally explained why the Thirteen Colonies considered themselves independent from British rule. The document lists 27 grievances against King George III and asserts natural rights including life, liberty, and the pursuit of happiness. Its signing was an act of treason punishable by death, yet delegates ratified it unanimously on July 4, 1776. (This is an automatically generated summary.)