Thomas Kempis (ca. 1380-1471) was an Augustinian monk in the Netherlands during the pre-Reformation period. Carl Anderson is the Supreme Knight and chief executive officer of the Knights of Columbus, the world's largest Catholic fraternal service organization with more than 1.7 million members. He is the author of Called to Love, Our Lady of Guadalupe, and the New York Times bestseller A Civilization of Love- What Every Catholic Can Do to Transform the World.