Full Idea
It seems proper to say that events of themselves possess no causal powers; only persisting objects (individual substances) possess causal powers.
Gist of Idea
It seems proper to say that only substances (rather than events) have causal powers
Source
E.J. Lowe (A Survey of Metaphysics [2002], p.211)
Book Reference
Lowe,E.J.: 'A Survey of Metaphysics' [OUP 2002], p.211
A Reaction
This requires events to be reduced to substances, which invites Aristotle's question of where the movement comes from. In physcis, 'energy' is the key concept.