influential 1964 essay The Paranoid Style in American Politics. Hofstadter sought to identify the characteristics of the groups. Hofstadter defined politically paranoid individuals as feeling persecuted, fearing conspiracy, and acting over-aggressive yet socialized. Hofstadter and other scholars in the 1950s argued that the major left-wing movement of the 1890s, the Populists, showed what Hofstadter said was "paranoid delusions of conspiracy by the Money Power". Historians have also applied the paranoid category to other political movements, such as the conservative Constitutional Union Party of 1860. Hofstadter's approach was later applied to the rise of new right-wing groups, including the Christian right and the Patriot movement. Trumpism The political success of Donald Trump has prompted American historian Rick Perlstein to argue that historians have underestimated the influence and power on the modern American political right of populist, nativist, authoritarian, and conspiracy-minded right-wing movements, such as the Black Legion, Charles Coughlin, the Christian Front, and "birther" speculation; and to overestimated the more libertarian influence of William F. Buckley's limited government, free trade, free market intellectual conservatism, and the neoconservative pro-immigration and optimistic outlook of Ronald Reagan. Current size Political scientist Gary Jacobson, gives an estimate of the "size of the extremist vote" as a fraction of Republican Party voters (there being essentially no right-wing extremists in the Democratic party), based on sympathizers as well as active supporters of the "Proud Boys, Oath Keepers, QAnon etc.". He points to survey data of Republicans who answered "yes" to questions such as whether they had a "favorable opinion of the people who invaded the Capitol on Jan. 6", thought it likely that Donald Trump would "be reinstated as president before the end of 2021", and whether it was "definitely true" that “top Democrats are involved in elite child sex-trafficking rings.” Based on the results, which were stable over 2020-2022, he estimated that "20 to 25 percent of the Republican electorate can be considered extremists". Social structure Sociologists Lipset and Raab were focused on who joined these movements and how they evolved. They saw the development of radical right-wing groups as occurring in three stages. In the first stage certain groups came under strain because of a loss or threatened loss of power and/or status. In the second stage they theorize about what has led to this threat. In the third stage they identify people and groups whom they consider to be responsible. A successful radical right-wing