The True Believer: Thoughts on the Nature of Mass Movements is a non-fiction book authored by the American social philosopher Eric Hoffer. Published in 1951, it depicts a variety of arguments in terms of applied world history and social psychology to explain why mass movements arise to challenge the status quo. Hoffer discusses the sense of individual identity and the holding to particular ideals that can lead to extremism and fanaticism among both leaders and followers. Hoffer initially attempts to explain the motives of the various types of personalities that give rise to mass movements in the first place and why certain efforts succeed while many others fail. He goes on to articulate a cyclical view of history such that why and how said movements start, progress and end is explored. Whether intended to be cultural, ideological, religious, or whatever else, Hoffer argues that mass movements are broadly interchangeable even when their stated goals or values differ dramatically. This makes sense, in the author's view, given the frequent similarities between them in terms of the psychological influences on its adherents. Thus, many will often flip from one movement to another, Hoffer asserts, and the often shared motivations for participation entail practical effects. Since, whether radical or reactionary, the movements tend to attract the same sort of people in his view, Hoffer describes them as fundamentally using the same tactics including possessing the rhetorical tools. As examples, he often refers to the purported political enemies of communism and fascism as well as the religions of Christianity and Islam. The first and best-known of Hoffer's books, The True Believer has been published in twenty-three editions between 1951 and 2002. He later touched upon similar themes in other works. Prominent leaders and social commentators who have remarked publicly about their interest in the book include American President Dwight D. Eisenhower as well as American Secretary of State and First Lady Hillary Clinton. Although receiving widespread popular acclaim, the socio-political debate spurred on by the book in terms of academic analysis and commentary has been ongoing. The core thesis of the interchangeability of mass movements and the inherent weakness within them that can cause adherents to slide into dogma and absolutism has attracted significant challenge; multiple scholars have used historical examples of solid group identities that rarely became interchangeable with other communities. Hoffer himself stated that he intended his analysis not to inherently condemn