Mark S. McLeod-Harrison PhD is Professor of Philosophy at George Fox University. He is the author of Rationality and Belief in God; Make/Believing the World(s): Toward a Christian Ontological Pluralism; Repairing Eden; Apologizing for God; The Resurrection of Immortality; and Image, Incarnation, and Expansivism; along with a book of poetry, and dozens of journal articles. He has been thinking about the doctrine of the communion of the saints for 20 years. This book flows out of those 20 years of thought. He is the husband of Susan McLeod-Harrison and father of three children, one of whom is grown and married. He is now engaged in writing philosophically about the Christian doctrine of sin in light of evolution and the so-called “species problem.”