"what possible pressure could produce an ability to see morality?"
Unlike the other Richard, I don't think we "see" morality with a special "sense", or anything like that. But if we instead understand morality as a rational idealization, building on our perfectly ordinary general capacity for systematizing judgments so as to increase their overall coherence (treating like cases alike, etc.), then there's no great mystery here.
"what possible pressure could produce an ability to see morality?"
Unlike the other Richard, I don't think we "see" morality with a special "sense", or anything like that. But if we instead understand morality as a rational idealization, building on our perfectly ordinary general capacity for systematizing judgments so as to increase their overall coherence (treating like cases alike, etc.), then there's no great mystery here.