Helga Zepp-LaRouche is a German political activist. She is the widow of American political activist Lyndon LaRouche, and the founder of the LaRouche movement's Schiller Institute, as well as the German Bürgerrechtsbewegung Solidarität party (BüSo).

Lyndon Hermyle LaRouche Jr. was an American political activist who founded the LaRouche movement and its main organization, the National Caucus of Labor Committees (NCLC). He was a prominent conspiracy theorist and perennial presidential candidate. He began in far-left politics in the 1940s and later supported the Civil Rights movement, but in the 1970s he moved to the far-right. His movement is sometimes described as, or likened to, a cult. Convicted of fraud, he served five years in prison from 1989 to 1994.