Could we have evolved speech without evolving morality, or morality without evolving speech?
I want to shout, of course we could have. Speech and morality are both peculiar to our species, but that’s a coincidence. We have all seen many a glib sociopath. Stalin was even a pretty good poet in his younger days (see: Simon Montefiore Young Stalin), although the force of his conscience was always limited. But I’ve come across an essay (for publication next year) by a distinguished philosopher of biology, Francisco Ayala, titled, “What the Biological Sciences Can and Cannot Contribute to Ethics” (available here) that has forced me to rethink.