The Moravians, a Protestant sect founded in 1727 by Count Nikolaus Ludwig von Zinzendorf and based in Germany, were key players in the rise of international evangelicalism. In 1741, after planting communities on the frontiers of empires throughout the Atlantic world, they settled the communitarian enclave of Bethlehem, Pennsylvania, in order to spread the Gospel to thousands of nearby colonists and Native Americans. In time, the Moravians became some of early America's most successful...