Marx's theory of class is a central element of Marxist thought, referring to the social stratification and conflict that Karl Marx and Friedrich Engels argued was a defining feature of human history and particularly acute under capitalism. For Marx, a class is a group of people defined by their relationship to the means of production—the facilities, tools, land, and resources by which a society's goods are produced. He posited that the history of class society (that is all society in which classes and a structure of class have existed) is fundamentally a story of class conflict, in which the ruling class, which owns and controls the means of production, exploits the subordinate classes who do not.
In capitalist society, Marx identified two primary classes: the bourgeoisie (the capitalist class), which owns the means of production, and the much larger proletariat (the working class), which must sell its own labor power to survive. This relationship is inherently exploitative, as the capitalists extract surplus value from the workers' labor. This economic antagonism is the root of class struggle, which, in Marx's view, would eventually culminate in a proletarian revolution. He saw the proletariat as a unique "special class" whose historical conditions and interests would lead it not only to overthrow the bourgeoisie but to abolish all class distinctions and create a classless society.
Marx's analysis also accounted for other classes and strata, such as the petty-bourgeoisie (small business owners and professionals), the peasantry, and the lumpenproletariat (the declassed and socially marginal). He viewed these groups as transitional or intermediate, often politically unstable and ultimately subordinate to the main conflict between the bourgeoisie and proletariat. A key principle of his political theory was the self-emancipation of the working class, arguing that the proletariat must achieve its own liberation through its own organized struggle, rather than being freed by benevolent saviors or elite groups.
Fundamental concepts
Definition of class
According to Hal Draper, Karl Marx never provided a complete definition of "class" in a single, dedicated text, but his understanding is consistently demonstrated throughout his work. For Marx, class is not determined by income, occupation, or social status, but by a group's relationship to the means of production. In any given society, the key distinction is between those who own the means of producing wealth and those who do not. The owning class constitutes the ruling class, while the others are the exploited classes. This division is not a static sociological category but a dynamic social relationship rooted in the production process. The specific form of this relationship defines the economic and political character of each historical epoch. In capitalism, for example, the defining relationship is between the wage-worker and the employer of labor power, a relationship that presupposes a class of owners and a class of propertyless workers.
Marx's definition of class under capitalism is rooted in a two-fold separation inherent to its mode of production. The first is the separation between the units of production, where social production is coupled with private appropriation. Individual enterprises, though interdependent parts of a social production system, are privately owned, and their products are commodities to be sold on the market. The second, more fundamental separation is that of the "direct producers" from the means of production. This historical expropriation creates a class of propertyless workers who are compelled to sell their labor power to the capitalist class in exchange for a wage, a relationship which is continually reproduced by the workings of the capitalist system.
Marx distinguished between a "class in itself" () and a "class for itself" (). A "class in itself" is a group that shares a common relationship to the means of production but lacks a collective consciousness of its shared interests or role. It becomes a "class for itself" when it achieves political organization and consciousness of its position and historical goals. This transformation, Marx argued, occurs through the process of class struggle.
Class struggle and revolution Marx's theory posits that "the history of all hitherto existing society is the history of class struggles". This ongoing conflict between exploiting and exploited classes is the primary engine of historical change. Marx distinguished between a political revolution and a social revolution. A political revolution alters the governmental structure or transfers power between factions of the same ruling class. A social revolution, however, is a more fundamental transformation involving the transfer of state power to a new class, which then remodels society according to its own interests and establishes a new mode of production.
The class that takes power must, in its first moments, conquer political power in order to represent its interest as the general interest. The ultimate goal of the proletarian revolution is the creation of a classless society. By overthrowing the bourgeoisie, the proletariat would "sweep away the conditions for the existence of class antagonisms and of classes generally, and will thereby have abolished its own supremacy as a class." For Marx, the defining tenet of his theory was this practice of proletarian revolution and the theory and practice of class power.
Class and political representation While Marx's foundational analysis defined classes by their economic position, his treatment of how these classes act in the political sphere is more complex and evolved over his career. This is particularly evident when comparing his earlier and later works. In the Communist Manifesto, written at a time of revolutionary optimism, Marx and Friedrich Engels present a model of escalating class polarization, where society "is more and more splitting up into two great hostile camps": the bourgeoisie and the proletariat. In this model, the economic classes themselves are expected to become the direct political actors as the proletariat organizes into a political party to pursue its own interests. The Manifesto identifies several historical tendencies that would drive this process, including the de-skilling of labor, the concentration of workers in factories, the increasing precarity of their existence, and the downward social mobility of the petty-bourgeoisie.
However, in later works like The Eighteenth Brumaire of Louis Bonaparte, which analyzes the complex class struggles in France after 1848, Marx's model becomes more nuanced. Here, the idea of classes acting directly as monolithic political forces is replaced by the more complex concept of political "representation". The political forces active in the struggle—parties, parliamentary factions, military leaders, and literary figures—are seen as representing the interests of various social classes. This relationship is not straightforward; a political group may represent a class without its members being drawn from that class, and the class itself may not consciously support its representatives. For example, Marx's analysis of Louis-Napoléon Bonaparte's rise to power shows him representing the atomized, conservative small-holding peasantry, a class incapable of representing itself and therefore requiring an external authority to act in its name. This analysis highlights the possibility of radical dislocation between a class and its political representatives, such as when the French bourgeoisie, fearing disorder, "condemned the parliamentary struggle of [its own representatives] as a disturbance of order". The concept of representation in Marx's work is thus not a simple mechanism of expression but rather marks the site of a complex, often contradictory, relationship between economic classes and political actors.
Classes in capitalist society In capitalist society, Marx identified two main, antagonistic classes defined by their relationship to the means of production. These are the bourgeoisie (the owners) and the proletariat (the workers). He also analyzed several other classes and social strata that occupied intermediate or marginal positions in the social structure.
Bourgeoisie
The bourgeoisie, or capitalist class, is the class that owns the means of production and employs wage labor. Historically, the bourgeoisie played a revolutionary role by overthrowing the feudal system and developing industrial capitalism, which enormously expanded humanity's productive forces. However, in Marx's analysis of the 1848 revolutions, he concluded that the bourgeoisie, particularly in Germany, had become a counter-revolutionary force. Fearing the rise of the proletariat more than it desired to complete its own democratic revolution against absolutist remnants, the bourgeoisie preferred to compromise with the old order.
This "thesis of incapacity" became a central part of Marx's theory: that the latter-day bourgeoisie was no longer capable of carrying out a consistent democratic revolution, a task that would now fall to the proletariat and its allies. Marx argued that as the bourgeoisie develops industry, it simultaneously produces its own "gravediggers"—the proletariat. A "turning-point" is reached where the bourgeoisie's fear of the proletariat's political power outweighs its drive for further expansion, making it a reactionary class.
Proletariat
The proletariat is the industrial working class, which lacks ownership of the means of production and is compelled to sell its labor power to the capitalists for a wage.
Economic definition In Marx's specific economic definition, the term proletariat is not synonymous with all wage-workers. It refers to the working class peculiar to capitalism, whose labor produces surplus value in the process of commodity production. This includes workers who are not directly engaged in manual or industrial labor. Marx's concept of the "collective laborer" () encompasses all workers whose labor contributes to the production of a commodity, including those involved in intellectual, supervisory, or transport roles. An editor, for example, is as much a part of this collective as a shipfitter. In his broader political writings, however, Marx often used "proletariat", "workers", or "working class" to denote this core class and its penumbra of other wage-workers.
The "special class" Marx and Engels saw the proletariat as the uniquely revolutionary class of the modern era, for several historical reasons:
Propensity to organize: The conditions of industrial production bring workers together in large numbers, teaching them discipline and cooperation. Capitalism itself "assembles the bourgeois and the proletarians", compelling the working class to organize. Interests aligned with struggle: The proletariat's basic economic and social needs are systematically frustrated by capitalism. The struggle to defend its interests as a class compels it to challenge the foundations of the system. Tendency toward anti-bourgeois institutions: The organized struggle of the working class inherently pushes against the rights of private property, as it insists on social responsibility for all vital aspects of life, from wages and working conditions to health and education. Capacity for militancy: The proletariat's conditions of existence, as a class alienated from the products of its labor and the means of production, push it toward a persistent boldness and militancy at critical stages of struggle. Social weight and strategic position: The proletariat is the only class with the collective power to halt and reorganize production, as it is at the "levers of economic power". Embodies a social program: The proletariat's class position objectively points to a program that resolves the contradictions of capitalism: the abolition of private property and the creation of a democratically organized society.