accordance with knowable laws. Cold War In The Origins of Totalitarianism, Hannah Arendt posited that Nazi and Communist regimes were new forms of government and not merely updated versions of the old tyrannies. According to Arendt, the source of the mass appeal of totalitarian regimes is their ideology which provides a comforting and single answer to the mysteries of the past, present and future. For Nazism, all history is the history of race struggle and for Marxism–Leninism all history is the history of class struggle. Once that premise is accepted, all actions of the state can be justified by appeal to nature or the law of history, justifying their establishment of authoritarian state apparatus. In addition to Arendt, many scholars from a variety of academic backgrounds and ideological positions have closely examined totalitarianism. Among the most noted commentators on totalitarianism are Raymond Aron, Lawrence Aronsen, Franz Borkenau, Karl Dietrich Bracher, Zbigniew Brzezinski, Robert Conquest, Carl Joachim Friedrich, Eckhard Jesse, Leopold Labedz, Walter Laqueur, Claude Lefort, Juan Linz, Richard Löwenthal, Karl Popper, Richard Pipes, Leonard Schapiro and Adam Ulam. Each one of these described totalitarianism in slightly different ways, but they all agreed that totalitarianism seeks to mobilize entire populations in support of an official party ideology and is intolerant of activities that are not directed towards the goals of the party, entailing repression or state control of the business, labour unions, non-profit organizations, religious organizations and minor political parties. At the same time, many scholars from a variety of academic backgrounds and ideological positions criticized the theorists of totalitarianism. Among the most noted were Louis Althusser, Benjamin Barber, Maurice Merleau-Ponty and Jean-Paul Sartre. They thought that totalitarianism was connected to Western ideologies and associated with evaluation rather than analysis. The concept became prominent in the Western world's anti-communist political discourse during the Cold War era as a tool to convert pre-war anti-fascism into postwar anti-communism. In 1956, the political scientists Carl Joachim Friedrich and Zbigniew Brzezinski were primarily responsible for expanding the usage of the term in university social science and professional research, reformulating it as a paradigm for the Soviet Union as well as fascist regimes. Friedrich and Brzezinski wrote that a totalitarian system has the following six mutually supportive and defining characteristics: Elaborate guiding ideology. Single mass party, typically led by a dictator. System of terror, using such instruments as violence and secret police. Monopoly on weapons. Monopoly