Congregationalism is a Reformed Christianity (Calvinist) tradition of Protestant Christianity in which churches practise congregational government. Each congregation independently and autonomously runs its own affairs. These principles are enshrined in the Cambridge Platform (1648) and the Savoy Declaration (1658), Congregationalist confessions of faith. The Congregationalist Churches are a continuity of the theological tradition upheld by the Puritans. Their genesis was through the work of Congregationalist divines Robert Browne, Henry Barrowe, and John Greenwood.