I'll justify ripping off VDare's recurrent article naming theme by segueing into congratulating the site for getting a much needed aesthetic makeover, and I'll even do so upon discovering that this humble blog has apparently been dropped from VDare's roll as, I hope, an incidental consequence of the revamp. Anyway, I wanted to publish a few odds-and-ends correlations, so instead of cramming them all into the title, I'll just filch it.
At its essence, to celebrate diversity in the contemporary West is to celebrate the portion of the population that is non-white. Contingent upon context, it might also refer to the portion of the population that is non-heterosexual, non-Christian, non-Western European, etc. But in its most recognizable form, diversity is basically synonymous with non-whiteness.
Using that as the definition, the correlation between diversity and income inequality (as measured by the gini coefficient) at the state level in the US is .43 (p = .00).
More than that (much more than that, actually), though, diversity is also poor academic performance. The correlation between NAEP science and math test scores (that I used to estimate average state IQ numbers) and diversity is a vigorous .77 (p = .00).
Parenthetically, one of my earliest recollections of the formation of a personal partisan leaning was after my dad outlined for me the basic differences between the two major parties. I concluded something to the effect of "So, if people are happy and do well, Republicans should do well, too. If they're unhappy and struggling, Democrats should do well." Relative equality isn't sufficient for happiness, but it's probably necessary. And red states are modestly more egalitarian than blue states are--the correlation between McCain's share of the vote and inequality is an inverse .31 (p = .02).