Karl Heinrich Marx (May 5, 1818–March 14, 1883) was a German philosopher, political economist, historian, political theorist, sociologist, communist and revolutionary credited as the founder of communism.

Marx summarized his approach to history and politics in the opening line of the first chapter of The Communist Manifesto (1848): “The history of all hitherto existing society is the history of class struggles.” Marx argued that capitalism, like previous socioeconomic systems, will produce internal tensions which will lead to its destruction. Just as capitalism replaced feudalism, socialism will in its turn replace capitalism and lead to a stateless, classless society which will emerge after a transitional period, the "dictatorship of the proletariat". See, for example, Marx's comments in section one of The Communist Manifesto on feudalism, capitalism, and the role internal social contradictions play in the historical process: "We see then: the means of production and of exchange, on whose foundation the bourgeoisie built itself up, were generated in feudal society. At a certain stage in the development of these means of production and of exchange, the conditions under which feudal society produced and exchanged...the feudal relations of property became no longer compatible with the already developed productive forces; they became so many fetters. They had to be burst asunder; they were burst asunder. Into their place stepped free competition, accompanied by a social and political constitution adapted in it, and the economic and political sway of the bourgeois class. A similar movement is going on before our own eyes.... The productive forces at the disposal of society no longer tend to further the development of the conditions of bourgeois property; on the contrary, they have become too powerful for these conditions, by which they are fettered, and so soon as they overcome these fetters, they bring disorder into the whole of bourgeois society, endanger the existence of bourgeois property." Marx, K. & Engels, F. (1848),The Communist Manifesto

On the one hand, Marx argued for a systemic understanding of socio-economic change. He argued that the structural contradictions within capitalism necessitate its end, giving way to communism:

On the other hand, Marx argued that socio-economic change occurred through organized revolutionary action. He argued that capitalism will end through the organized actions of an international working class, led by a Communist Party: "Communism is for us not a state of affairs which is to be established, an ideal to which reality 1 have to adjust itself. We call communism the real movement which abolishes the present state of things. The conditions of this movement result from the premises now in existence." (from The German Ideology)