David M. VanDrunen (PhD, Loyola University Chicago; JD, Northwestern University) is Robert B. Strimple Professor of Systematic Theology and Christian Ethics at Westminster Seminary California. A minister of the Orthodox Presbyterian Church and anattorney, his books include Natural Law and the Two Kingdoms: A Study in the Development of Reformed Social Thought, and Bioethics and the Christian Life: A Guide to Making Difficult Decisions.