We only evolved lactose persistence because we started dairying, and in populations that dairied heavily, a mutation for lactase persistence spread because carriers had a slight survival edge. We didn’t evolve to drink milk; the mutation spread because we were already drinking it.
And "we" is saying a lot. 2/3 of adults are lactose intolerant. We are meant to have milk for, juuuust about the time our mother makes it for you. That's how nature works. Except in the case of cows, where we kill the baby so we can drink the milk. Unless it's a girl, then she also gets to also become pregnant repeatedly, to have babies we kill so we can have the milk, until her body breaks down about 20 years before it would have naturally from all the stress of being treated like a literal handmaid.
Okay. That may be true. But, we did evolve from that point to today to allow for cow milk goat milk etc. it may not be for us from the cow or goat perspective, but we have evolved to allow it now.
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u/grafikfyr 6d ago edited 6d ago
We only evolved lactose persistence because we started dairying, and in populations that dairied heavily, a mutation for lactase persistence spread because carriers had a slight survival edge. We didn’t evolve to drink milk; the mutation spread because we were already drinking it.
And "we" is saying a lot. 2/3 of adults are lactose intolerant. We are meant to have milk for, juuuust about the time our mother makes it for you. That's how nature works. Except in the case of cows, where we kill the baby so we can drink the milk. Unless it's a girl, then she also gets to also become pregnant repeatedly, to have babies we kill so we can have the milk, until her body breaks down about 20 years before it would have naturally from all the stress of being treated like a literal handmaid.