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John Byrne
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Grumpy Old Guy

Joined: 11 May 2005
Posts: 136117
Posted: 04 May 2026 at 4:01pm | IP Logged | 1 post reply

I do want to add that I have zero doubt that quite literally all of us have, in our ancestry, ancestors who were the product of these kind of relationships.

•••

Oh, there’s worse than that!

With each generation we go back, we double the number of ancestors we have. Two biological parents, four grandparents, eight great grandparents, and so on.

Problem is, go back about 30 generations, and we each have more ancestors than there were people on Earth. In order to get the necessary numbers, we end up with a whole lot of cousin-humping—and closer!

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Evan S. Kurtz
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Joined: 04 July 2022
Location: Canada
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Posted: 04 May 2026 at 4:10pm | IP Logged | 2 post reply

I mean, we share 50% of our DNA with bananas. Yes, spanning back the quarter of a million years we've been here as a species, there's been a lot of sexual assault and incest in all of our ancestry. Even if there wasn't directly, eventually we'd go back and reach a point where we find commonality. 

Edited by Evan S. Kurtz on 04 May 2026 at 4:10pm
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Brian Miller
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Joined: 28 July 2004
Location: United States
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Posted: 04 May 2026 at 4:26pm | IP Logged | 3 post reply

Problem is, go back about 30 generations, and we each have more
ancestors than there were people on Earth. In order to get the necessary
numbers, we end up with a whole lot of cousin-humping—and closer!
****
Of course that happened, and probably a LOT more than we realize or even
want to know, but your estimation doesn’t take into account siblings and
how they share the same sets of parents, grandparents, etc.
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John Byrne
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Grumpy Old Guy

Joined: 11 May 2005
Posts: 136117
Posted: 04 May 2026 at 5:08pm | IP Logged | 4 post reply

Doesn’t need to. A single thread is enough.
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