"polygeneticism had mostly died out"

Ah - can't find the link - but very recently a new genetic line was found in a cave in Siberia, and it now appears that there WAS polygeneticism - that several different lines including Neanderthals and 'modern' man as well as this older strain, of which the modern closest relatives are still in New Guinea, all interbred.

Then there of course is this theory of The Other People, which The Biblical Literalists really cannot deny, if they wish to be consistent .... :-)

But then people can believe whatever they want, as long as they stop trying to bully and interfere in Science, for I am a FSM follower...