Our ancestors have always known that free sexuality would lead to a bad outcome for everyone. In our hubris, we have decided we know better and started an experiment with consequences that are beginning to show.
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Humans are a naturally polygynous species. Comparisons of paternally inherited Y-DNA vs. maternal mDNA show a divergence in genetic diversity such that for every one male, 17 females have reproduced.
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Replying to @chimeracide
17:1 is a lot higher than I've read before, which was closer to 2:1 or 3:1.
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