One (wo)man can change the world.
"Never doubt that a small group of thoughtful, committed citizens can change the world; indeed, it's the only thing that ever has."
I think that applies to the individual too. It takes one to lead that group. Even if you are not that person, in a world as complex as ours, you never know what action on your part might have on someone, your community, area, county, state....
Yeah, every big change has to start somewhere.
And thanks for adding the wo. You're the man.