Nazis, Communists, Klansmen, and Others on the Fringe

Nazis, Communists, Klansmen, and Others on the Fringe: Political Extremism in America is a 1992 book by John George and Laird Wilcox. It is an examination of political extremism of both the far-left and far-right in the United States. It was published by Prometheus Books in 1992 as a 523-page hardcover. In 1996, Prometheus Books republished it as American Extremists: Militias, Supremacists, Klansmen, Communists and Others in a 443-page paperback.

The authors attempt to summarize the pre-1960 historical background of American extremist movements, discuss conspiracy theories and their validity, offer their insight on what motivates extremists, and discuss a number of contemporary groups on the "far-left" and "far-right" based principally on their personal contacts with approximately six hundred individual extremists and the extremists' own writings.