The twentieth-century history of Cuba borders on fantasy. This diminutive country boldly and repeatedly exercises the foreign policy of a major power. Although closely tied to the United States through most of its modern history, Cuba successfully defied the U.S. government after 1959, consolidated its own power, and defeated an invasion of U.S.-backed exiles at the Bay of Pigs in 1961. Fidel Castro then brought the world alarmingly close to nuclear...