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This was also a conclusion in a thoughty2 youtube video I watched: This Is Why Inbreeding Is So Dangerous https://www.youtube.com/watch?v=hmv-z851BOE https://w

• pessimizer 6y ago
  You are the result of a thousand generations of cousin-breeding, and from zero to a couple dozen generations of not-cousin breeding. There are still current anti-incest traditions followed by modern people that pretty much read "You will marry your cousin." The sky doesn't fall in on them, although miscarriages and infant mortality are high, as well as a bunch of recessive diseases.
• rsynnott 6y ago
  > I'm pretty this is why people all over the world like to keep track of their ancestry. People who don't will be more closely inbred. Not sure about that. Tracking ancestry probably became a middle-class hobby in mimicry of the aristocracy in the 19th and 20th centuries, and the aristocracy in most places were notoriously pretty much okay with marrying cousins.
  • goodcanadian 6y ago
    There isn't actually much risk in marrying a cousin. It is when successive generations marry cousins that you become more closely related to your cousin than you might naively expect. This is where the inbreeding risk comes from. And, parts of the aristocracy did, in fact, have significant effects from this inbreeding.
• jacobush 6y ago
  I'm slightly wary of thoughty2, I enjoy (can't say "like" nowadays) his videos, but I feel he is prone to the trap of many smart people, where he is too convincing, even to himself sometimes.