It's true that there is a rescue thing in people, and not just rescuing the family, which is kind of obvious from a biological point of view. But why is it that some people will jump into a freezing river and swim out to a downed plane for total strangers? What is that about? And it seems to be that it's part of your concept of who you are. That's why some people run into the burning buildings, because if they don't, their concept of who they are will be violated. They wouldn't be who they thought they were.
Margaret Atwood