The civil rights campaign eventually produced a larger and more intractable “underclass” than existed before. This baffled liberal idealists who had expected a new era of brotherhood and equality. They could only account for it by “structural racism,” and the Marxian trope of “oppressors-and-victims” fit into that scaffold perfectly. It lured them into Marxian “praxis” generally, which by then was already failing everywhere else in the world where it had been tried as “communism.”