Anthony Kenny offers a critical examination of Thomas Aquinas's influential account of being, arguing that it suffers from systematic confusion. Because of the centrality of the doctrine, this has implications for other parts of Aquinas's philosophical system. Kenny's clear and incisive study dispels the confusion and offers philosophers and theologians a guide through the labyrinth of Aquinas's ontology.About the Author: Sir Anthony Kenny was formerly President of the British Academy, and Pro-Vice-Chancellor of the University of Oxford. His recent work includes a magisterial new history of Western philosophy, to be published by OUP in four volumes.