Originally published in 1987. This book comprises a critical exposition of the thoughts on metaphysics of the major philosophers of the tradition. It introduces the ideas of these philosophers to students but is of interest to teachers as well. The author begins with a survey of the metaphysical writings of Plato, Aristotle, Berkeley, Leibniz and Bradley, clarifying throughout the relation of their methods and results to those of science. He follows this with a careful study of the critical attitudes to metaphysics espoused by Kant, Wittgenstein and the Logical Positivists. In the final section he scrutinizes the attempts by Collingwood, Wisdom and Lazerowitz to rehabilitate metaphysics.