From antiquity, Plato's Parmenides has been considered an enigma. In this book Robert Turnbull offers a translation and explanation of the Parmenides, using his interpretation to illuminate Plato's major late dialogues.

Turnbull claims that in the Parmenides Plato abandoned the earlier Phaedo account of form-participation, and instead worked out the metaphysics of form-participation and mathematics that grounds the framework of his late philosophy. Relying on the testimony of Aristotle, Euclid, and Plotinus, and rejecting most modern accounts, Turnbull...