or group except their own. Independents have never cared for the Soviet Union, while some have given "critical support" to Cuba or even China.American groups of this nature include the Workers World party (originally Trotskyist) and the Progressive Labor party (originally Maoist).
Inasmuch as political extremism is more a matter of style rather than content, it's not the case that the only left extremist groups are the Marxist-Leninists. Any group identified with nominally "leftist" political positions may be "extremist" to some extent. Extreme radical feminists or environmentalists, for example, may be as "extreme" in their behaviors as the most dedicated Marxist-Leninist. One of the modern innovations of Marxist-Leninist theory has been the increasing transformation of ethnic and gender oppression to overshadow the traditional role of working-class oppression in its worldview. However, for the purposes of this book we have focused on groups that espouse distinct political ideologies.