How to Inspire People to Do Amazing Things

I have seen many people get inspired to do good, but you can oft inspire people to do bad. I think the idea that we should care about future people is just utterly common sense. Harm is har no matter when it occurs. We should care about people whether they're in this country or on the other side of the planet,. No matter where they are in time as well. So how how do we begin to get people to agree with that?