This is a seriously useful repost on our ancestral DNA. Understand that we had potentially a large number of clearly separate antecedents quite able to be bred. Humanity had a lifeway that actually encouraged exactly that.
Hunting bands were surprised and over run. This meant that the males and children were killed and consumed outright, while the females were clearly bred.
Then once our particular lineage began to truly expand, numbers naturally overwelmed all other types.
Recall what has happened to first nations in the USA. Female absorption into the settler population along with large families for the farmers doomed native demographics. Settler population expansion was startling during the nineteenth century.
https://www.youtube.com/watch?v=BKXB_bi9Z6Q
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