The Birth of Belief

It is widely accepted that doxa, which plays a major role in Plato's and Aristotle's epistemologies, is the Ancient counterpart of belief. We argue against this consensus: doxa is not generic taking-to-be-true, but instead something closer to mere opinion. We then show that Plato shows little sign of interest in the generic notion of belief; it is Aristotle who systematically develops that notion, under the rubric of hupolêpsis (usually translated as 'supposition'), a much-overlooked notion that is, we argue, central to his epistemology. We close by considering the significance of this development, outlining the shifts in epistemological concerns enabled by the birth of belief as a philosophical notion.