The aim of this paper is to provide a new reading of Plato’s precosmos ( . 52d2–53c3). More specifically, I shall argue that the precosmos is populated by bodies deriving from random complexes of properties, and that this is the effect of the Receptacle’s full precosmic participation in the Paradigm. This will turn out to be consistent with a robust notion of ‘precosmic generation’ and will reveal why Plato may have sought to refer to this otherwise puzzling scenario: representing the precosmos in this way allows Plato to effectively justify why the Demiurge is responsible for the goodness and perfection of the universe, and why it is properly the best possible cause.