答案:The Declaration of Independence was mainly drafted by Thomas Jefferson and was adopted by the Congress on July 4, 1776, when the people of 13 English colonies in North America were fighting for their freedom and independence from the British colonial rule. The document declared that all men were equal and that they were entitled to have some unalienable rights such as life, liberty and the pursuit of happiness. It also explained the philosophy of governments: the powers of governments came from the consent of the governed and the purpose of governments was to secure the rights mentioned above. The theory of politics and the guiding principles of the American Revolution mainly came from John Locke.