Book excerpt: In Roman Catholic Political Philosophy author James V. Schall tries to demonstrate that Roman Catholicism and political philosophy---revelation and reason--are not contradictory. It is his contention that political philosophy, the primary focus of the book, asks certain questions about human purpose and destiny that it cannot, by itself, answer. Revelation is the natural complement to these important questions about God, human being, and the world. Schall manages to avoid polemicism or triumphalism as he shows that revelation and political thought contribute to a fuller understanding of each other.