This work investigates whether the early dialogues of Plato, specifically the Euthyphro, contain an implicit theory of Forms that anticipates the more developed metaphysical framework found in the Republic. R. E. Allen, a noted scholar of ancient philosophy, challenges the traditional developmentalist view that Plato's theory of Forms emerged only in his middle period. By analyzing the logical structure of definitions in the Euthyphro, Allen argues that the seeds of the later theory are present from the beginning of Plato's philosophical career. The book provides a rigorous re-evaluation of how Plato conceptualized universals and their relationship to particulars in his earliest writings.

Scholars frequently cite this text as a significant contribution to the debate regarding the chronological development of Platonic thought. It is considered a dense, specialized study that requires a strong background in classical Greek philosophy to fully appreciate the author's logical arguments.