The dropping of the atomic bombs was the logical culmination of the way World War II had been fought. All wars inflict suffering on noncombatants.
But never before had civilian populations been so ruthlessly targeted. Military personnel represented 90 percent of those who died in World War I. But of the estimated 50 million persons who perished during World War II (including 400,000 American soldiers), perhaps 20 million were civilians. Germany had killed millions of members of “inferior races.” It had repeatedly bombed London and other cities. The Allies carried out even more deadly air assaults on civilian populations. Early in 1945, the firebombing of Dresden killed some 100,000 people, mostly women, children, and elderly men. On March 9, nearly the same number died in an inferno caused by the bombing of Tokyo.
Four years of war propaganda had dehumanized the Japanese in American eyes, and few persons criticized Truman’s decision in 1945. But public doubts began to surface, especially after John Hersey published Hiroshima (1946), a graphic account of the horrors suffered by the civilian population. General Dwight D. Eisenhower, who thought the use of the bomb unnecessary, later wrote, “I hated to see our country be the first to use such a weapon.”