Born in 1901, Paul Weiss has made major contributions to several branches of philosophy, as well as to teaching and scholarly publishing. Alfred North Whitehead remarked: The danger of philosophical teaching is that it may become dead-alive, but in Paul Weiss’s presence that is impossible . Weiss is widely believed to be America’s greatest living speculative metaphysician, but he has also made notable philosophical contributions to the discussion of sports, the arts, religion, logic, and politics. Professor Weiss has been highly productive: his Being and Other Realities (1995) was hailed as one of his most exciting books, and as this volume goes to press he is hard at work on yet another major treatise.