During the second half of the seventeenth century the entire intellectual framework of educated Europe underwent a radical transformation. A secularized view of humanity and nature was replacing faith in the direct operation of God's will in the temporal world, while a growing confidence in human reason and the Scientific Revolution turned back the epistemological skepticism spawned by the Reformation. By focusing on the Dutch Collegiants, a radical Protestant group that flourished in Holland from 1620 to 1690, Andrew Fix explicates the mechanisms at work in this crucial intellectual...