William Penn (1644-1718) was founder and "Absolute Proprietor" of the Province of Pennsylvania. He was known as an early champion of democracy and religious freedom and famous for his good relations and his treaties with the Lenape Indians. Under his direction, Philadelphia was planned and developed. The democratic principles that he set forth in the Pennsylvania Frame of Government served as an inspiration for the United States Constitution. As a pacifist Quaker, Penn considered the problems of war and peace deeply. He wrote a comprehensive, detailed explanation of Quakerism along with a testimony to the character of George Fox, in his introduction to the autobiographical Journal of George Fox. In effect, Penn became the first theologian, theorist, and legal defender of Quakerism, providing its written doctrine and helping to establish its public standing. In 1668, Penn was imprisoned in the Tower of London after writing a follow up tract entitled The Sandy Foundation Shaken. Although after Penn"s death Pennsylvania slowly drifted away from a colony founded by religion to a secular state dominated by commerce, many of Penn"s legal and political innovations took root.