The earliest Stoics shared a great deal with Plato and his followers, so why didn’t the early Stoics just join Plato’s Academy? The problem was metaphysics. Plato’s most distinctive doctrine was his theory of Forms, but in the view of Aristotle and the Stoics, Platonic Forms cannot be distinct and separate substances that cause physical particulars to be what they are. ‘The origins of the school’ explains that the Stoics had to develop a metaphysical status for such things that acknowledged their ‘reality’ without treating them as bodies. It explains the Stoics’ nominalism and how Stoics adopted the division of philosophy into logic, physics, and ethics.