Dawkins on inclusive fitness

So we discussed the mother guarding paper (posted below) this week at our journal club, and Alan Rogers (a geneticist here) pointed out that the authors did not model inclusive fitness correctly. No one but him caught this, of course, but we'd all fallen for a common misconception about inclusive fitness. He passed around this brief excerpt from the Extended Phenotype where Dawkins addresses this. I thought I'd include it here, so we can all be certain of our definitions of this prettttty pretttty prettty important concept. (imagine that last bit in my best Larry David voice.)

Check it out, it's worth a read: (click to enlarge)