Dangerous Ideas on CampusIn 1960, University of Illinois professor Leo Koch wrote a public letter condoning premarital sex. He was fired. Four years later, a professor named Revilo Oliver made white supremacist remarks and claimed there was a massive communist conspiracy. He kept his job. Matthew Ehrlich revisits the Koch and Oliver cases to look at free speech, the legacy of the 1960s, and debates over sex and politics on campus. The different treatment of the two men marked