  The plan for this article is as follows. Section 1 will provide biographical information about McTaggart. I will then begin to discuss the central themes of McTaggart’s philosophy. Section 2 focuses on McTaggart’s views on the methods of metaphysics. Section 3 discusses McTaggart’s famous argument for the unreality of time.  Section 4 will focus on McTaggart’s philosophy of religion, which was a kind of atheistic mysticism. Section 5 will focus on McTaggart’s ontological idealism, which is a view akin to the idealism of Leibniz and Berkeley. Section 6 will focus on McTaggart’s position on what was perhaps the central metaphysical debate of his period, namely, the issue of monism vs. pluralism as well as the concordant issue of the reality of relations. Section 7 will be devoted to a smorgasbord of topics of interest to contemporary metaphysicians, including McTaggart’s views on parts and wholes, the distinction between existence and reality, and questions about essentialism.