The discipline consisted in investigation of laws, patterns, ways, and forms of class struggle, socialist revolution, and development of socialism and construction of communism.
Social democracy is simply the embodiment of the modern proletariat's class struggle, a struggle which is driven by a consciousness of its own historic consequences.
If the working classes could be united in class struggle to overthrow their common rulers, a 32 county socialist republic would be the inevitable outcome.
Utopian socialists feel socialism can be achieved without class struggle and that cooperatives should only include those who voluntarily choose to participate in them.