Under shari'a law, non-Muslims, known as dhimmi, have been forbidden to possess arms, and to defend themselves from attacks by Muslims. The disarmament is one aspect of the pervasive civil inferiority of non-Muslims, a status known as dhimmitude. This Essay examines the historical effects of the shari'a disarmament, based on three books by Bat Ye'or, the world's leading scholar of dhimmitude. As Ye'or details, the disarmament had catastrophic consequences, extending far beyond the direct loss of the dhimmi's ability to defend themselves. The essay concludes by observing how pretend gun-free zones on college campuses turn the adults there into 21st century dhimmi, unable to defend themselves against murderous predators.