Anaxagoras’s metaphysical foundations
This chapter introduces Anaxagoras’s metaphysics and the relations of fundamentality and composition that hold between entities in his ontology: the Opposites (properties), stuffs, objects, the so-called seeds (i.e., reified structures), and nous with its vortex. The chapter argues that the crux of Anaxagoras’s metaphysics, which will also influence Plato the most, is the stance that parts of properties are parts of objects. Objects are qualified by properties by having parts of properties (in preponderance) within their constitution. Thus, constitutional overlap is the ‘mechanism’ by which Anaxagoras accounts for the qualification of objects. The chapter provides an account of Anaxagoras’s Opposites as causal powers and explains the type of causal efficacy the Opposites have in the world: constitutional causal efficacy.