War is the least interesting place to look for heros but it is undeniable there, read stories of medal of honor recipients and tell me they pulled off some insane shit because of "self interest".
No, virtually every gift bestowed upon you by this world is a direct or indirect product of people making the strange choice to act in the interests of the greater good against ridiculous odds when the easier choice was screaming at them to take it. That is how it always begins :)