Sure, but that's still leaning heavy on slow genetic changes in populations, but we don't see small, slow, genetic populations over 5-10-50 generations. We see jumps in 1, 2, and 3. That's why the East German example is so dramatic. It's 1 maybe 2 generations, and you're talking about a 1 SD fall in IQ in only a couple decades, and you have, effectively, a control group in West Germany.
Starve the people, disincentiveize the people, and tyrannize the people, and their IQ collapses. That's not genetic even predominantly genetic.
Sure, but that's still leaning heavy on slow genetic changes in populations, but we don't see small, slow, genetic populations over 5-10-50 generations. We see jumps in 1, 2, and 3. That's why the East German example is so dramatic. It's 1 maybe 2 generations, and you're talking about a 1 SD fall in IQ in only a couple decades, and you have, effectively, a control group in West Germany.
Starve the people, disincentiveize the people, and tyrannize the people, and their IQ collapses. That's not genetic even predominantly genetic.