Earlier quoted context omitted.
Unfortunately, the US is incomparable (in the neutral sense of the word) when it comes to most socio-economic issues. There literally is no other country that is similar to the US across more than one or two important factors.
USA is very comparable to Brazil in every sense except perhaps GDP. For now.
Yeah, but GDP is one of the most important socio-economic factors there is. Which makes drawing analogies between the US and Brazil not very useful most of the time. And even race, where I think the comparison is most apt, there is an important difference, in that the US has more ethnic diversity among its elite class. I believe Brazil's elites are almost entirely descended from European Catholics, whereas the US elite class has been split between WASPs and Jews for at least 100 years and is now being cracked open quite rapidly by people of East Asian and South Asian descent.