One: I think Lukeprog says it pretty well here:

“Oh my God,” you think. “It’s not that I have a rational little homunculus inside that is being ‘corrupted’ by all these evolved heuristics and biases layered over it. No, the data are saying that the software program that is me just is heuristics and biases. I just am this kluge of evolved cognitive modules and algorithmic shortcuts. I’m not an agent designed to have correct beliefs and pursue explicit goals; I’m a crazy robot built as a vehicle for propagating genes without spending too much energy on expensive thinking neurons.”

Two: Good point. Social goals and nonsocial goals are only rarely at odds with one another, so this may not be a particularly fruitful line of thought. Still, it is possible that the idea of rational "irrationality" is neglected here.