The Better Angels of Our Nature: Why Vio - By Steven Pinker Page 0,152

conditions of the world as he found them and then shaped and manipulated them to his own ends.136

Fifty-five million deaths later (including at least 12 million who died in Japan’s own atavistic campaign to dominate East Asia), the world was once again in a position to give peace a chance.

THE LONG PEACE: SOME NUMBERS

I have spent a lot of this chapter on the statistics of war. But now we are ready for the most interesting statistic since 1945: zero. Zero is the number that applies to an astonishing collection of categories of war during the two-thirds of a century that has elapsed since the end of the deadliest war of all time. I’ll begin with the most momentous.

• Zero is the number of times that nuclear weapons have been used in conflict. Five great powers possess them, and all of them have waged wars. Yet no nuclear device has been set off in anger. It’s not just that the great powers avoided the mutual suicide of an all-out nuclear war. They also avoided using the smaller, “tactical” nuclear weapons, many of them comparable to conventional explosives, on the battlefield or in the bombing of enemy facilities. And the United States refrained from using its nuclear arsenal in the late 1940s when it held a nuclear monopoly and did not have to worry about mutually assured destruction. I’ve been quantifying violence throughout this book using proportions. If one were to calculate the amount of destruction that nations have actually perpetrated as a proportion of how much they could perpetrate, given the destructive capacity available to them, the postwar decades would be many orders of magnitudes more peaceable than any time in history.

None of this was a foregone conclusion. Until the sudden end of the Cold War, many experts (including Albert Einstein, C. P. Snow, Herman Kahn, Carl Sagan, and Jonathan Schell) wrote that thermonuclear doomsday was likely, if not inevitable.137 The eminent international studies scholar Hans Morgenthau, for example, wrote in 1979, “The world is moving ineluctably towards a third world war—a strategic nuclear war. I do not believe that anything can be done to prevent it.”138 The Bulletin of the Atomic Scientists, according to its Web site, aims to “inform the public and influence policy through in-depth analyses, op-eds, and reports on nuclear weapons.” Since 1947 it has published the famous Doomsday Clock, a measure of “how close humanity is to catastrophic destruction—the figurative midnight.” The clock was unveiled with its minute hand pointing at 7 minutes to midnight, and over the next sixty years it was moved back and forth a number of times between 2 minutes to midnight (in 1953) and 17 minutes to midnight (in 1991). In 2007 the Bulletin apparently decided that a clock with a minute hand that moved two minutes in sixty years was due for an adjustment. But rather than tuning the mechanism, they redefined midnight. Doomsday now consists of “damage to ecosystems, flooding, destructive storms, increased drought, and polar ice melt.” This is a kind of progress.

• Zero is the number of times that the two Cold War superpowers fought each other on the battlefield. To be sure, they occasionally fought each other’s smaller allies and stoked proxy wars among their client states. But when either the United States or the Soviet Union sent troops to a contested region (Berlin, Hungary, Vietnam, Czechoslovakia, Afghanistan), the other stayed out of its way.139 The distinction matters a great deal because as we have seen, one big war can kill vastly more people than many small wars. In the past, when an enemy of a great power invaded a neutral country, the great power would express its displeasure on the battlefield. In 1979, when the Soviet Union invaded Afghanistan, the United States expressed its displeasure by withdrawing its team from the Moscow Summer Olympics. The Cold War, to everyone’s surprise, ended without a shot in the late 1980s shortly after Mikhail Gorbachev ascended to power. It was followed by the peaceful tear-down of the Berlin Wall and then by the mostly peaceful collapse of the Soviet Union.

• Zero is the number of times that any of the great powers have fought each other since 1953 (or perhaps even 1945, since many political scientists don’t admit China to the club of great powers until after the Korean War). The war-free interval since 1953 handily breaks the previous two records from the 19th century of 38 and 44 years. In fact, as of May 15, 1984, the