Marxist-Leninist refers to the political ideology that combines the ideas of Karl Marx with the revolutionary strategies of Vladimir Lenin. This ideology emphasizes the need for a vanguard party to lead the working class in overthrowing capitalism and establishing a dictatorship of the proletariat, which is seen as necessary to achieve a classless society. In the context of Eastern Europe, it shaped the policies and practices of communist governments, especially under Stalin, leading to widespread control and repression.