Plato (c. 427–c. 347 B.C.) posited a "demiurge" of supreme wisdom and intelligence as the creator of the cosmos in his work "Timaeus". For him, the "demiurge" lacked the supernatural ability to create "ex nihilo" or out of nothing. The demiurge was able only to organize the "ananke" (αναγκη). The ananke was the only other co-existent element or presence in Plato's cosmogony. Plato's teleological perspective is also built upon the analysis of "a priori" order and structure in the world that he had already presented in "The Republic".