[jaredsohn]

Kicking a rock on the street is different than the other examples you gave in that the directly measured impact is minimal.

It is possible that it could cause major change (in a butterfly effect kind of way), but usually it would be hard to measure and predict.

But if you kick a rock and a few days later that rock ends up causing an accident of an "important" person you did in fact "change the world" by kicking that rock.

IMO, the other things that you mentioned have changed the world.