“Scientific racism” is on the rise on the right. But it’s been lurking there for years.

“In 1990, Charles Murray was forced to change jobs. He’d spent the 1980s at the Manhattan Institute, where he wrote his influential book Losing Ground, which argued that government-directed social welfare programs increase poverty and should be cut. The book, popular within the Reagan administration, provided a social science justification for deep welfare cuts.
But then Murray clashed with the conservative think tank’s leadership over his next project: a study on race and IQ. The general tenor of the project was easy enough to guess, even in its early stages. Murray was partnering with Richard Herrnstein, a Harvard psychologist who in 1971 published a piece on IQ in the Atlantic, in which he argued that a society without a strict class structure would soon become an intellectual aristocracy, with high-IQ people clustered at top and low-IQ people at bottom. Herrnstein believed this was already happening in the United States, as high-IQ people increasingly married one another, creating a growing divergence from low-IQ Americans.”