 Hartshorne was more in the mainstream of philosophical discussions about God than was Whitehead. He spoke of proofs for God’s existence and defended them vigorously, although he ceased calling them “proofs” when he realized the differences between his approach and more traditional ones. Hartshorne is best known for his voluminous writings on the ontological argument—he devotes two books and numerous articles to the topic (Hartshorne 1962 &amp; 1965a). Despite his fondness for his revised ontological argument, he never considered it sufficient unto itself to make the case for God’s existence. The ontological argument is one strand of a multiple argument strategy—which Basil Mitchell calls a “cumulative case”—in which the various elements are mutually reinforcing.