Excellent. We need more psychologists who train people to not die.

One of the defining moments of my early childhood was when I learned of the murder of Kitty Genovese (http://en.wikipedia.org/wiki/Murder_of_Kitty_Genovese). When I found out that several of her neighbors heard her calls for help but none of them called 911, I resolved that nobody would ever die because I failed to make a phone call. I was perhaps six years old.

Starting from being determined to never fail to make a phone call, it didn't feel like much of a stretch to be determined to never fail to act.