The concept of "humanity" as a whole is one I was struggling with at the beginning. Quite honestly, there is very little I, personally, will do that will affect humanity as a whole - as a species. It is the aggregate of all our actions that affects the species as a whole; what I control and and what I can change is, very often, only my portion of the aggregate, dealing only with that part of the population I can affect.
I'm going to start another thread in a bit for the population thing.
