Self-sacrifice in the name of humanity seems like a desperate solution actually. The world is too big to move because of a small ripple created by one single human. It can move if that human can move other millions of humans towards the same purpose goal. This can be used for evil or good purposes as history has shown. But I agree with you on learning people how to fish instead of handing out bags of goodies.
The abundance mentality is a discipline, you were spot on on that. When people will understand that the Universe has plenty for all then things will shift. Of course that a person living in absolute poverty and war will raise their brows when hearing about the Universe being so abundant as they lack the environment and mental habit to get out of their physical reality.