One thing about racial diversity - a lot of metrics simply divide up the world into 4 groups (white, black, asian, hispanic) and then measure how close a popula

One thing about racial diversity - a lot of metrics simply divide up the world into 4 groups (white, black, asian, hispanic) and then measure how close a population is to 25% of each group. Quite a while ago (like 15+ years ago), I read a bit on language diversity, a chart of the number of languages spoken by at least 1000 households. San Francisco actually was highest on the list, higher even than New York (which was also very high up there). Sorry for no cite, it was a while ago, I haven't been able to recreate this. SF's diversity may have dropped a bit since then, but it's most assuredly still there (I hear several different languages at least every day just walking around). But I do think it's another decent metric. After all, by the first measurement, there is essentially no diversity in Asia, which is absurd.