I think signaling loyalty (which is very important for coalition-building) and other virtues is probably comparable in importance as a function of language to signaling intelligence, so Miller does seem to over-emphasize the latter as an explanation, and he does also seem to have a tendency to over-emphasize sexual selection.
I think signaling loyalty (which is very important for coalition-building) and other virtues is probably comparable in importance as a function of language to signaling intelligence, so Miller does seem to over-emphasize the latter as an explanation, and he does also seem to have a tendency to over-emphasize sexual selection.