Vanguardism, a core concept of Leninism, is the idea that a revolutionary vanguard party, composed of the most conscious and disciplined workers, must lead the proletariat in overthrowing capitalism and establishing socialism, ultimately progressing to communism.
The vanguard works to engage the working class in revolutionary politics and to strengthen proletarian political power against the bourgeoisie.
Revolutionary socialism is a political philosophy, doctrine, and tradition within socialism that stresses the idea that a social revolution is necessary to bring about structural changes in society. More specifically, it is the view that revolution is a necessary precondition for transitioning from a capitalist to a socialist mode of production. Revolution is not necessarily defined as a violent insurrection; it is defined as a seizure of political power by mass movements of the working class so that the state is directly controlled or abolished by the working class as opposed to the capitalist class and its interests.
Revolutionary socialists believe such a state of affairs is a precondition for establishing socialism and orthodox Marxists believe it is inevitable but not predetermined. Revolutionary socialism encompasses multiple political and social movements that may define "revolution" differently from one another. These include movements based on orthodox Marxist theory such as De Leonism, impossibilism and Luxemburgism, as well as movements based on Leninism and the theory of vanguardist-led revolution such as the Stalinism, Maoism, Marxism–Leninism and Trotskyism. Revolutionary socialism also includes other Marxist, Marxist-inspired and non-Marxist movements such as those found in democratic socialism, revolutionary syndicalism, anarchism and social democracy.
Communism (from Latin communis 'common, universal') is a political and economic ideology whose goal is the creation of a communist society, a socioeconomic order centered on common ownership of the means of production, distribution, and exchange that allocates products in society based on need. A communist society entails the absence of private property and social classes, and ultimately money and the state. Communism is a part of the broader socialist movement.
Communists often seek a voluntary state of self-governance but disagree on the means to this end. This reflects a distinction between a libertarian socialist approach of communization, revolutionary spontaneity, and workers' self-management, and an authoritarian socialist, vanguardist, or party-driven approach to establish a socialist state, which is expected to wither away. Communist parties have been described as radical left or far-left.