Throughout his career, Kant engaged with many of the fundamental questions in philosophy of religion: arguments for the existence of God, the soul, the problem of evil, and the relationship between moral belief and practice. Religion within the Boundaries of Mere Reason is his major work on the subject.

This book offers a complete and internally cohesive interpretation of Religion. In contrast to more reductive interpretations, as well as those that characterize Religion as internally inconsistent, Lawrence R. Pasternack defends the rich philosophical theology contained in each of Religion's four parts, and shows how the doctrines of the "Pure Rational System of Religion" are eminently compatible with the essential principles of Transcendental Idealism. The book also presents and assesses: