Cause of events

A glass is knocked off a counter, and when the glass hits the ground, it shatters.

Now, if we ask what is the property of the glass in virtue of which it shattered, the answer is (say) "It was fragile."
But this can't be complete, because the glass was fragile before it fell. The falling seems to be crucial, but the falling was an event.

So the notion that an entity's properties are a sufficient cause of events in which it is the subject is inadequate...