"Metaphysical Pluralism" is an analysis of the conditions and causes for the multiplicity of metaphysical systems. It argues for the viability of metaphysical pluralism — the view that there is more than one plausible metaphysical system, and that there can be good reasons for these various views. Without arguing a specific theory of metaphysics, this thesis defends the ability of metaphysical knowledge to remain critical and rational in the face of the sceptical claim of relativism.Chapter One and the Appendix discuss the more general issues of conceptual pluralism as found in the social sciences. Ideas of autonomy and relativism from Wittgenstein and Winch are criticized, and it is concluded that there is no a_ priori guarantee tha...