The post-war expansion of university faculties climaxed in the early 1970s. Since then, there have been more professional philosophers than ever before in history: a startling claim, but sober truth. In analytic philosophy, they have worked with more rigour and better training than even the Scholastics. It would take a surprising lack of talent among us, or perhaps argue some deep defect in the questions we ask, if the result were not more progress in philosophy than most periods can boast. And in fact, those who know what progress in philosophy looks like can see a lot of it: just compare Malcolm's 1960 piece on the ontological argument with Plantinga's 1974 treatment in The Nature of Necessity, and then both with Oppy's book on the subject.