Dinosaur GenXers like me recall that after the fall of the Berlin Wall, the foreign policy set was busy asking how the United States would cash its forthcoming "peace dividend," whether NATO would fold up shop having achieved its ostensible purpose, and maybe whether we were entering "the end of history"? How short-sighted. Instead, the pace of war-fighting from the 1950s (the original "peace dividend"), to the 1990s increased by a multitude of twelve. See my chart below. Overall, the United States has engaged in 481 total military engagements since 1798—287 of them since 1989 (60% of...