I think globalized but diverse was always kind of a pipe dream because along with things you're trading across the globe you're also spreading information back

I think globalized but diverse was always kind of a pipe dream because along with things you're trading across the globe you're also spreading information back and forth. And as the article points out, human preference is roughly the same in aggregate across the globe, so we all loosely converge on a local maximum of "the best" rinse, repeat, and you suddenly get homogenization.