The important thing about this hypothesis is that it multiplies the effect of all other modifications, like schools or heat, so it’s at least part of the answer whatever the proximal cause is (which I still think is possibly just this + behavioral changes, but do feel a little underwhelmed without some other factor).
The important thing about this hypothesis is that it multiplies the effect of all other modifications, like schools or heat, so it’s at least part of the answer whatever the proximal cause is (which I still think is possibly just this + behavioral changes, but do feel a little underwhelmed without some other factor).