The Fifth Ape Richard Dawkins

This Richard Dawkins documentary, The Fifth Ape, deals with the philosophical and social ramifications of the theory of evolution.

To find out whether sexual selection plays a role for altruism and kindness among humans, he visits women who are looking for sperm donors, as well as a sperm bank manager. One of the sperm banks most popular donors is a really nice guy. Dawkins explains that all organisms are survival machines. How does Dawkins define the selfish gene? What is kin selection? What is altruistic helping?