Two other important things happened as the United States crossed the danger zone. One was that America could downshift: It could move from an extremely high-cost strategy geared toward meeting a point of maximum peril to a somewhat lower-cost strategy geared toward meeting a less acute but ongoing challenge. By the end of the 1950s, American defense spending had fallen to around 9 percent of gross national product. On average, it continued to fall over the rest of the Cold War.56 The other development was that it became possible to occasionally decrease U.S.-Soviet tensions. Stalin’s death in
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