Altruism without gods

This is not today's scheduled Something Surprising blog post (which is coming later) but merely a pointer to a great post by The Lady Atheist.  Read it at "What I've Learned from Watching Eagle Families".

It is about evidence for altruism in families of eagles, and it suggests rather a lot about the origins of human altruism. 

Apparently it is not necessary to have a god to have this quality.