Good point, but are we inherently good or are we constantly receiving negative reinforcement to keep us in line? Those who risk their lives are far fewer than those who would use others as human shields, by my observation at least.<quoted text>
If that was true then civilization would never have succeeded at all. It would have destroyed itself and we'd still be hunting in Africa with dwindling numbers instead of becoming the superior species. The traits called "conscience" and "empathy" are common to the most successful species on this planet. Even simply caring for our young is "good," by any standard. The majority of humans are willing to even risk their own lives for each other, that is evident in the number of volunteer soldiers and emergency response teams. If there was no "good" in humans, we'd not have medicine at all.
We just live in nice neighborhoods.