Rabin's mistake was simple and profound: One cannot "make peace with one's enemy," as he imagined. Rather, one makes peace with one's former enemy. Peace nearly always requires one side in a conflict to be defeated and thus give up its goals.
Wars end not through goodwill but through victory. "Let your great object [in war] be victory" observed Sun Tzu, the ancient Chinese strategist. "War is an act of violence to compel the enemy to fulfill our will," wrote his nineteenth-century Prussian successor, Karl von Clausewitz in 1832. Douglas MacArthur observed in 1951 that in "war, there is no substitute for victory."
Technological advancement has not altered this insight. Fighting either continues or potentially can resume so long as both sides hope to achieve their war goals. Victory consists of imposing one's will on the enemy, compelling him to give up his war ambitions. Wars typically end when one side gives up hope, when its will to fight has been crushed.
Defeat, one might think, usually follows on devastating battlefield losses, as was the case of the Axis in 1945. But that has rarely occurred during the past sixty years. Battlefield losses by the Arab states to Israel in 1948-82, by North Korea in 1953, by Saddam Hussein in 1991, and by Iraqi Sunnis in 2003 did not translate into despair and surrender. Morale and will matter more these days. Although they out-manned and out-gunned their foes, the French gave up in Algeria, the Americans in Vietnam, and the Soviets in Afghanistan. The Cold War ended, notably, with barely a fatality. Crushing the enemy's will to fight, then, does not necessarily mean crushing the enemy.