[benfarahmand]

I can't think of physical processes that could go from macro -> micro. The examples I can think of stem from Yuval Harari's human fictions affecting the world. For example, a nation state or a corporation or a story could set the stage for the macro affecting the micro. If we look at a story, it communicates an idea that changes the behaviors of humans, which in turn causes those humans to interact with the micro and the macro.

As I'm writing this out and thinking about it, where would fictional objects fit on the micro <--> macro axis?

[naasking]

Fictions are encoded in the brain's microstates and drive its behaviour, comparable to how gate charge on transistors drives a computer state. But that is an interesting thought, because all of those microstates and their evolution are counterfactually described by a computer program, and much like math, perhaps a computer program in some sense has a platonic existence that isn't reducible to physical states. I probably wouldn't go in that direction, but some philosophers have made this case for math.