 This conceptualist approach is reinforced if one accepts both what has been called the Eleatic Principle, namely that something can be a real, concrete entity only if it has causal powers of its own, and, that the physical world is “closed under physics”. The latter entails that only the entities of physics influence the distribution and motion of matter, so that higher-order entities, though they may figure in essential forms of explanation, have no influence on that on which everything physical supervenes. Applying the Eleatic Principle to this, macro “entities” are not real in the way that anything worth calling hylomorphism, in the Aristotelian tradition, requires (Robinson 2016: Part II).