The first generation of New England Puritans required that church members undergo a conversion experience that they could describe publicly. Their successors were not as successful in reaping harvests of redeemed souls. The movement began with Jonathan Edwards, a Massachusetts preacher who sought to return to the Pilgrims' strict Calvinist roots. British preacher George Whitefield and other itinerant preachers continued the movement, traveling across the colonies and preaching in a dramatic and emotional style. Followers of Edwards and other preachers of similar religiosity called themselves the "New Lights," as contrasted with the "Old Lights," who disapproved of their movement. To promote their viewpoints, the two sides established academies and colleges, including Princeton and Williams College. The Great Awakening has been called the first truly American event.