Inclusive fitness theory

Friendship and Kinship

Friendship and Kinship

Over the last two weeks, media coverage of an article has repeatedly found its way into my inbox. It’s an interesting piece by Nicholas Christakis and James Fowler on the genetics of friendship. The article is very technical, but the take-away is perfectly simple: friends have more genes in common than you’d expect, except where they have fewer genes in common than what you’d expect. OK, so maybe it’s not perfectly simple.