“Conspiracy theory” is not merely a flippant or off-handed water cooler term, but rather a powerful tool of political discourse. “Deployed as a pejorative putdown,” political scientist Lance deHaven-Smith observes,
the label is a verbal defense mechanism used by political elites to suppress mass suspicions that inevitably arise when shocking political crimes benefit top leaders or play into their agendas, especially when those same officials are in control of agencies responsible for preventing events in question or for investigating them after they have occurred.[3]
Along these lines, “conspiracy theory” and its common variants, “assassination buff,” “crackpot,” “wacko,” and so on, were essentially interpolated into news reports and commentary in the late 1960s by CIA media assets as the agency maneuvered to bolster the Warren Commission’s “lone assassin” explanation of John F. Kennedy’s assassination.
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