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 and writer of fiction and poetry Jean-Pierre Faye in his 1972 book Théorie du récit: introduction aux langages totalitaires, in relation to Otto Strasser.