Conspiracy theory
United States

The historian Richard Hofstadter addressed the role of paranoia and conspiracism throughout U.S. history in his 1964 essay " The Paranoid Style in American Politics ". Bernard Bailyn 's classic The Ideological Origins of the American Revolution (1967) notes that a similar phenomenon could be found in North America during the time preceding the American Revolution. Conspiracism labels people's attitudes as well as the type of conspiracy theories that are more global and historical in proportion.

Harry G. West and others have noted that while conspiracy theorists may often be dismissed as a fringe minority, certain evidence suggests that a wide range of the U.S. maintains a belief in conspiracy theories. West also compares those theories to hypernationalism and religious fundamentalism. Theologian Robert Jewett and philosopher John Shelton Lawrence attribute the enduring popularity of conspiracy theories in the U.S. to the Cold War, McCarthyism, and counterculture rejection of authority. They state that among both the left-wing and right-wing, there remains a willingness to use real events, such as Soviet plots, inconsistencies in the Warren Report, and the 9/11 attacks, to support the existence of unverified and ongoing large-scale conspiracies.

In his studies of "American political demonology", historian Michael Paul Rogin too analyzed this paranoid style of politics that has occurred throughout American history. Conspiracy theories frequently identify an imaginary subversive group that is supposedly attacking the nation and requires the government and allied forces to engage in harsh extra-legal repression of those threatening subversives. Rogin cites examples from the Red Scares of 1919, to McCarthy's anti-communist campaign in the 1950s and more recently fears of immigrant hordes invading the US. Unlike Hofstadter, Rogin saw these "countersubversive" fears as frequently coming from those in power and dominant groups, instead of from the dispossessed. Unlike Robert Jewett, Rogin blamed not the counterculture, but America's dominant culture of liberal individualism and the fears it stimulated to explain the periodic eruption of irrational conspiracy theories. The Watergate scandal has also been used to bestow legitimacy to other conspiracy theories, with Richard Nixon himself commenting that it served as a " Rorschach ink blot " which invited others to fill in the underlying pattern.

Historian Kathryn S. Olmsted cites three reasons why Americans are prone to believing in government conspiracies theories:

Alex Jones referenced numerous conspiracy theories for convincing his supporters to endorse Ron Paul over Mitt Romney in the 2012 Republican Party presidential primaries and Donald Trump over Hillary Clinton in the 2016 United States presidential election. Into the 2020s, the QAnon conspiracy theory alleges that Trump is fighting against a deep-state cabal of child sex-abusing and Satan-worshipping Democrats.
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