"What is important to a relationship is a harmony of emotional roles and not too great a disparity in the general level of intelligence."

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Yes, over the centuries economic progress has reduced some gross disparities - modern Americans are relatively unlikely to simply starve to death (though it can happen), so in that sense the gap between rich and poor has narrowed. But the question isn't whether society is, in some sense, more equal than it was in 1900. It's whether it is radically more unequal than it was in 1970. And of course it is.

— Paul Krugman