In Caesar and Christ, Book III of his Story of Civilization, historian Will Durant argues that “biological factors” were “fundamental” to the fall of the Roman Empire: A serious decline of population appears in the West after Hadrian … . A law of Septimus Severus speaks of a penuria hominum—a shortage of men. In Greece the depopulation had been going on for centuries. In Alexandria, which had boasted of its numbers, Bishop Dionysius calculated that the population had in his time [250 A.D.] been halved. He mourned to see “the human race diminishing and constantly wasting away.” Only the
...more