The correct place of Karl Marx's early writings within his system as a whole has been a matter of great controversy. Some believe there is a break in Marx's development that divides his thought into two periods: the "Young Marx" is said to be a thinker who deals with the problem of alienation, while the "Mature Marx" is said to aspire to a scientific socialism.

Karl Marx was a German-born philosopher, economist, political theorist, historian, sociologist, journalist, and revolutionary socialist. His best-known works are the 1848 pamphlet The Communist Manifesto and the three-volume Das Kapital (1867–1894); the latter employs his critical approach of historical materialism in an analysis of capitalism and is the culmination of his intellectual efforts. Marx's ideas and theories and their subsequent development, collectively known as Marxism, have exerted enormous influence on modern intellectual, economic and political history.