Sr. Prudence Allen's extensive work on the concept of woman finds its culmination in this massive book, the third in a trilogy that began with a first volume on the Aristotelian revolution (up to 1250) and a second that traced developments from 1250 to 1500. In this exhaustively and meticulously researched book, Allen argues for an “integral complementarity” between man and woman that she argues is “proven” through its ability to cohere with John Henry Newman's criteria for doctrinal development, set out in his Essay on the Development of Doctrine (10–11). Through a detailed survey of both men and women thinkers since 1500, including some of the most prominent—Leonardo da Vinci, René Descartes, Immanuel Kant—as well as some lesser known—Elena Tarabotti and Moderata Fonte—Allen argues that only a conception of complementarity based in a revised Aristotelian hylomorphism can adequately account for what it means to be a woman as well as be in accord with Roman Catholic teaching.