This is the first collection of all of the major philosophical works of Cadwallader Colden (1688-1776), one of the most accomplished intellectual and political figures in the American colonies before the Revolution. As Lieutenant Governor of New York, he was intimately involved in the tumultuous political life of the times, and he represented the colonial government to the five nations of the Iroquois Confederacy. His History of the Five Indian Nations (1727) was the first English history of the Iroquois and a popular book both in the colonies and in Europe. A prolific letter writer, Colden corresponded with many of the major intellectuals of his day, including Benjamin Franklin and Samuel Johnson. He also wrote extensively on a wide range of topics, including philosophy, history, the natural sciences, and mathematics. Although several of Colden’s works have been available in anthologies, until now there has never been a collection of all of his philosophical writings. This anthology includes The Principles of Action in Matter , the Introduction to Phylosophy , The Introduction to The History of the Five Indian Nations , and the complete correspondence with Samuel Johnson on the subject of materialism and idealism. Also included is the first publication of Principles of Morality , written in 1745, but never published till now. For students of American philosophy, as well as those interested in the intellectual history of the colonial period, this is an essential work.