Abstract
Contrary to their predecessors, the Stoics put forward a unified notion of cause: a cause is a bodily because-of-which. Against the backdrop of Plato’s and Aristotle’s influential views, this is an original proposal. It involves the rejection of an earlier trend, according to which causes and explanations are closely associated. It also involves a pulling apart of causes and principles. And it comes with a charge against Plato and Aristotle, namely that they introduce a swarm of causes, a turba causarum.