Japan is essentially a monoculture. Other than their below-replacement birth rate, they don't seem to be struggling -- at least not based on any (non-existing)

Japan is essentially a monoculture. Other than their below-replacement birth rate, they don't seem to be struggling -- at least not based on any (non-existing) plan to diversify. The same is true for China. And India. In fact, let's just cut to the chase: it is only the west that seems to subscribe to this notion. P.S. Here's a culture that does appear to be "struggling" with / from diversity: Russia.