The concept of "imperialism" was considered outside the acceptable range of political discourse within the ruling circles of the capitalist world for most of the twentieth century. Reference to "imperialism" during the Vietnam War, no matter how realistic, was almost always a sign that the writer was on the left side of the political spectrum. In a 1971 foreword to the U.S. edition of Pierre Jalée's Imperialism in the Seventies Harry Magdoff noted, "As a rule, polite academic scholars prefer not to use the term 'imperialism.' They find it distasteful and unscientific."
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