Who was worse, Hitler or Stalin?

In the second half of the twentieth century, Americans were taught to see both Nazi Germany and the Soviet Union as the greatest of evils. Hitler was worse, because his regime propagated the unprecedented horror of the Holocaust, the attempt to eradicate an entire people on racial grounds. Yet Stalin was also worse, because his regime killed far, far more people, tens of millions it was often claimed, in the endless wastes of the Gulag. For decades, and even today, this confidence about the difference between the two regimes—quality versus quantity—has set the ground rules for the politics of memory. Even historians of the Holocaust generally take for granted that Stalin killed more people than Hitler, thus placing themselves under greater pressure to stress the special character of the Holocaust, since this is what made the Nazi regime worse than the Stalinist one.

Discussion of numbers can blunt our sense of the horrific personal character of each killing and the irreducible tragedy of each death. As anyone who has lost a loved one knows, the difference between zero and one is an infinity. Though we have a harder time grasping this, the same is true for the difference between, say, 780,862 and 780,863—which happens to be the best estimate of the number of people murdered at Treblinka. Large numbers matter because they are an accumulation of small numbers: that is, precious individual lives. Today, after two decades of access to Eastern European archives, and thanks to the work of German, Russian, Israeli, and other scholars, we can resolve the question of numbers. The total number of noncombatants killed by the Germans—about 11 million—is roughly what we had thought. The total number of civilians killed by the Soviets, however, is considerably less than we had believed. We know now that the Germans killed more people than the Soviets did. That said, the issue of quality is more complex than was once thought. Mass murder in the Soviet Union sometimes involved motivations, especially national and ethnic ones, that can be disconcertingly close to Nazi motivations.

It turns out that, with the exception of the war years, a very large majority of people who entered the Gulag left alive. Judging from the Soviet records we now have, the number of people who died in the Gulag between 1933 and 1945, while both Stalin and Hitler were in power, was on the order of a million, perhaps a bit more. The total figure for the entire Stalinist period is likely between two million and three million. The Great Terror and other shooting actions killed no more than a million people, probably a bit fewer. The largest human catastrophe of Stalinism was the famine of 1930–1933, in which more than five million people died.

Of those who starved, the 3.3 million or so inhabitants of Soviet Ukraine who died in 1932 and 1933 were victims of a deliberate killing policy related to nationality. In early 1930, Stalin had announced…