I think about material that could work in the novel or story as I'm writing. I see if I can get there through what's happening with the character. But it's by inclination. It's not "At this moment this will happen. " Usually with my characters you can't tell what has induced them to do anything. That's because, from my understanding of reality - which is always subjective - everything is overdetermined.
We reject the way the world is at the moment and we don't accept nuclear weapons