Full Idea
Concrete objects possess causal powers and relations, but abstract objects are incapable of having causal powers or relations.
Gist of Idea
Concrete and abstract objects are distinct because the former have causal powers and relations
Source
E.J. Lowe (A Survey of Metaphysics [2002], p.368)
Book Reference
Lowe,E.J.: 'A Survey of Metaphysics' [OUP 2002], p.368
A Reaction
Is this an observation or a definition? One might claim that an abstraction (such as a political ideal) can acquire causal power through a conscious mnd.