Horseshoe theory

In popular discourse, the horseshoe theory asserts that advocates of the far-left and the far-right, rather than being at opposite and opposing ends of a linear continuum of the political spectrum, closely resemble each other, analogous to the way that the opposite ends of a horseshoe are close together. The theory is attributed to the French philosopher Jean-Pierre Faye in his 1972 book Théorie du récit: introduction aux langages totalitaires, in relation to Otto Strasser.

Proponents point to a number of perceived similarities between the two extremes, such as tendencies to see politics in unambiguous and stereotypical terms; an "us vs. them" view of the world; holding confidently on to simplified views of the world; distrusting "authorities" and "elites"; and intense hostility towards those who hold other views. Peer-reviewed research on the subject have found mixed support for horseshoe theory.