This is the first book to document the extent of political cults on both the right and left and explain their significance for mainstream political organizations. The authors outline the defining characteristics of cults in general, and analyze the degree to which a variety of well-known movements fall within the spectrum of cultic organizations. The book covers such individuals and groups as Lyndon LaRouche, Fred Newman, Ted Grant, Marlene Dixon, the Christian Identity movement, Posse Commitatus, Aryan Nation, militias, and the Freemen. It explores the ideological underpinnings that predispose cult followers to cultic practices, along with the measures cults use to suppress dissent, achieve intense conformity, and extract extraordinary levels of commitment.