the casual title is because of the scientific and prehistoric nature of the subject

And South Asians have nearly same as Europeans.

Fantasizing about prehistory to justify contemporary racism is a very old pastime. It doesn’t aspire to logical consistency:

> From the “state of nature” and Romantic notions of virtuous German barbarians to theories about Neanderthals, killer apes, and a matriarchal paradise where women ruled, Geroulanos captures the sheer variety and strangeness of the ideas that animated many of the major thinkers of the eighteenth and nineteenth centuries, including Jean-Jacques Rousseau, Charles Darwin, and Karl Marx. Yet as Geroulanos shows, such ideas became, for the most part, the ideological foundations of repressive regimes and globe-spanning empires. Deeming other peoples “savages” allowed for guilt-free violence against them; notions of “killer apes” who were our evolutionary predecessors made war seem natural. The emergence of modern science only accelerated the West’s imperialism. The Nazi obsession with race was rooted in archaeological claims about prehistoric IndoGermans; the idea that colonialized peoples could be “bombed back to the Stone Age” was made possible by the technology of flight and the anthropological idea that civilization advanced in stages.

They were simply more attractive to homo sapiens females because of more chest hair, muscles, and better defined jawline.

I guess you'd rather not even be here?

This might be seen as a bit of a nitpick but I believe you mean mtDNA (mitochondrial).

This is far from being the only or even main explanation to their extinction.

The Neanderthal populations were extremely inbred, so I'd guess that was a bigger factor to their decline.

It's quite possible that at that point in time nobody was asking for permission and most sex would have been what we qualify today as rape.