Del Ratzsch earned a Ph.D. in philosophy at the University of Massachusetts. He is professor of philosophy at Calvin College and author of The Philosophy of Science (published by InterVarsity Press in the Contours of Christian Philosophy series), as well as several other books. Much of Ratzsch's work over the last seventeen years at Calvin College has sought to relate science and religion (and more recently creation and evolution) in a way that is philosophically informed, scientifically defensible and theologically meaningful. Although Ratzsch is optimistic that design theory can avoid past mistakes in the creation-evolution controversy, he stresses that fundamental clarifying work remains to be done in this area.