In this book, Christopher Kaczor argues against the plausibility of proportionalism and its first proponents, namely Peter Knauer, Joseph Fuchs, Bruno Schüller, Louis Janssens, and Richard McCormick. Examining the genealogy of the movement, he disputes a received history that depicts proportionalism as a recovery of Thomas Aquinas. Instead, contends Kaczor, proportionalism is best seen as the organic successor to the moral manuals of the pre-Vatican II era. Proportionalism arises not from Thomas but rather extends many of the tendencies and presuppositions of the manuals. In particular, it retains their marginalizing of the account of human action as a knowing-willing involving a number of stages not always consciously recognized yet carefully described by Thomas in Summa theologiae, Prima Secundae, 6-17. Kaczor shows that a great deal of the plausibility of proportionalism rests on a fragile foundation that is rapidly eroding, an education in the moral manuals.







