Abstract
Whatthe influences were which led to the development and formulation of the so-called Theory of Ideas, usually associated with the name of Plato, is a question of perennial interest. And the interest has been increased by the vigorous controversy that, during the last ten years, has been conducted round the question of the exact part played by Socrates in the development of this theory. All the available evidence on the question is accessible and familiar to students of Greek thought, and has been worked over many times. But as there is still no unanimity among scholars as to its true interpretation, it may be worth while to go over the ground once more, even if the only result is to confirm some view which has already been put forward and disputed