Josef Fuchs is one of the most important Catholic theologians of the 20th century, and this is the first full-scale treatment of his thinking. The author demonstrates how Fuchs' interpretation of natural law has evolved, and what this means for his positions on moral issues. Beginning with Fuchs' "pre- conversion" period, from 1941-1966, Graham describes how Fuchs' slowly changed his thinking and thereby incurred the wrath of the Vatican on certain social issues.