In this powerfully argued book, John Knasas engages a debate at the heart of the revival of Thomistic thought in the twentieth century. Richly detailed and illuminating, his book calls on the tradition established by Gilson, Maritain, and Owen, to build a case for Existential Thomism as a valid metaphysics. Being and Some Twentieth-Century Thomists is a comprehensive discussion of the major issues and controversies in neo-Thomism, including issues of mind, knowledge, the human subject, free will, nature, grace, and the act of being. Knasas also discusses the Transcendental Thomism of Marechal, Rahner, Lonergan, and others as he builds a carefully articulated case for completing the Thomist revival. His book will be an important resource for theologians, philosophers, and historians interested in the intellectual legacy of Scholasticism and Thomism.