This is a study of one of the levels, or hypostases, in the Neoplatonist Plotinus’ metaphysical hierarchy, the Intellect (Nous). Yet, a reader coming to it with the expectation of finding an inclusive study of this part of his metaphysics might well be slightly disappointed. This is because the book’s actual topic is ideally perfect thinking. For Plotinus, just as for Aristotle, metaphysics is...