Now that Claudine Gay is out as Harvard's president on evidence that she plagiarized research and failed to counter antisemitism on campus, Harvard's elites are steaming with fury. They had, after all, signed a letter urging that the university keep her and her wokester policies on board. But that wasn't the worst of it. The biggest indignity was in the knowledge of who took her down: Not a top Harvard scholar but a lowly Harvard night school student with the equivalent of a master's degree named Christopher Rufo, writing on his humble Substack. He was the one who found the...