 The intellectual leader of the group was Chris Pallis, who wrote under the name Maurice Brinton.In the People's Republic of China (PRC) since 1967, the terms ultra-left and left communist refers to political theory and practice self-defined as further left than that of the central Maoist leaders at the height of the Great Proletarian Cultural Revolution (GPCR).The terms are also used retroactively to describe some early 20th century Chinese anarchist orientations.