Full Idea
Causation always involves a material particular which produces or generates something.
Gist of Idea
Causation always involves particular productive things
Source
Harré,R./Madden,E.H. (Causal Powers [1975], 1.I.A)
Book Reference
Harré,R/Madden,E.H.: 'Causal Powers: A Theory of Natural Necessity' [Blackwell 1975], p.5
A Reaction
I agree with this. My bete noire is the idea that causation somehow results from laws or general truths. That gets the whole thing the wrong way round. This idea is based on the notion of 'powers'.