Breaking down the question
The question asks specifically how Marx makes social conflict the essential engine of social change. The examiner is not asking for a general survey of theories of change but for a focused exposition of the Marxist position, in which conflict is not an occasional disturbance but the very mechanism through which societies are transformed. The word "essential" is the pivot: for Marx, without conflict there is no fundamental change.
To answer well you must connect conflict to Marx's wider framework — dialectical and historical materialism, the mode of production, the contradiction between forces and relations of production, class and class struggle, and revolution. Conflict is embedded in this whole architecture; it is the form in which the contradictions of a mode of production are worked out and resolved.
A strong answer both expounds the theory faithfully and adds a critical dimension, since UPSC rewards evaluation. The broader landscape of change theories, within which the Marxist conflict model sits, is set out in our notes on theories of social change, and Marx's thought in our profile of Karl Marx.
How to approach it
Open by situating conflict within Marx's materialist conception of history, so the examiner sees that conflict is not a stray idea but part of a system. Introduce the dialectic and the primacy of the economic base.
Then build the core argument in steps: the mode of production and its class structure, the contradiction between developing forces of production and fixed relations of production, the intensification of class struggle, and the revolutionary rupture that installs a new mode of production. Illustrate with the historical sequence from feudalism to capitalism and the anticipated transition to socialism.
Close with critical assessment — the theory's power and its weaknesses, including the persistence of capitalism, the neglect of non-class conflicts, and Dahrendorf's reformulation. A balanced evaluation secures the top band.
Model answer
For Karl Marx, social conflict — above all class conflict — is not an accidental feature of society but the fundamental mechanism of historical change. His famous declaration, with Engels, that "the history of all hitherto existing society is the history of class struggles" captures the claim that conflict is the essential motor driving societies from one epoch to the next. To understand why, conflict must be placed within his materialist conception of history.
Marx held that the foundation of any society is its mode of production — the way in which people organise to produce their material means of subsistence. Every mode of production combines forces of production, such as technology, tools and labour, with relations of production, the social and property relations through which production is carried on. These relations divide society into classes defined by their position in production: those who own the means of production and those who, owning only their labour, must work for them. Because the interests of these classes are structurally opposed — the owning class appropriates the surplus produced by the working class — their relationship is inherently one of conflict and exploitation.
Change arises from a contradiction internal to this arrangement. The forces of production tend to develop and expand, but the relations of production remain fixed, tied to the interests of the dominant class. Over time the existing relations become a "fetter" on the further growth of the productive forces. This contradiction sharpens the antagonism between classes. Marx analysed change dialectically: every social order contains within itself the contradictions that will negate it, so that the seeds of transformation lie inside the existing structure. Conflict is the process through which these contradictions are expressed and ultimately resolved.
Class struggle intensifies as the exploited class develops from a "class in itself" — a group sharing an objective economic position — into a "class for itself", conscious of its shared interests and organised to pursue them. When the contradiction becomes acute and the subordinate class attains revolutionary consciousness, the outcome is not gradual adjustment but revolutionary rupture: the overthrow of the old ruling class, the transformation of the relations of production, and the establishment of a new mode of production with its own class structure. In this way, "no social order ever perishes before all the productive forces for which there is room in it have developed", and change comes through conflict rather than consensus.
Marx traced this pattern through history. The conflict between the rising bourgeoisie and the feudal aristocracy dissolved feudalism and installed capitalism. Capitalism in turn generates its own antagonism, between the bourgeoisie and an expanding, increasingly immiserated proletariat. Marx expected this contradiction to culminate in a proletarian revolution that would abolish private property and, through a transitional stage, lead to a classless communist society in which the very basis of class conflict — private ownership of the means of production — would disappear. Only then would the history of class struggle end.
Marx's view therefore contrasts sharply with the functionalist emphasis on order, integration and gradual adaptation. Where functionalists see conflict as pathological and change as smooth and evolutionary, Marx sees conflict as normal, structurally generated and the true source of qualitative transformation. Change is discontinuous, propelled by struggle rather than by adjustment.
The theory is powerful but not beyond criticism. Its central prediction — the collapse of capitalism through proletarian revolution — has not been borne out in the advanced industrial societies, where rising living standards, welfare provision and reform have blunted revolutionary consciousness. Critics argue that Marx underestimated the adaptability of capitalism and overstated economic determinism, neglecting the autonomy of politics, culture and ideas. Others note that his class model does not capture conflicts of gender, ethnicity, religion and nationality that have shaped modern change. Ralf Dahrendorf, while retaining conflict as the engine of change, detached it from ownership and relocated it in relations of authority within "imperatively coordinated associations", arguing that conflict persists in post-capitalist industrial society in institutionalised rather than revolutionary forms.
In conclusion, Marx views social conflict as essential to social change because change, for him, arises precisely from the contradictions and class antagonisms internal to each mode of production. Conflict is not a breakdown of the social order but the very process by which one order gives way to another. Even where his specific predictions have failed, his insistence that inequality, struggle and contradiction drive historical transformation remains one of sociology's most influential and enduring contributions.
Examiner's perspective
Examiners look for candidates who show that, for Marx, conflict is systemic rather than incidental. The best answers connect conflict to the whole apparatus — mode of production, forces and relations of production, class, contradiction and revolution — so the word "essential" in the question is fully earned. Merely stating that Marx believed in class struggle, without explaining the mechanism, stays in the middle band.
Illustration through the feudal-to-capitalist and capitalist-to-socialist transitions demonstrates applied understanding, and a contrast with the functionalist model of orderly change sharpens the argument. The strongest scripts add evaluation — the non-arrival of revolution, economic determinism, the neglect of non-class conflict, and Dahrendorf's reformulation — closing with a synthesis that affirms the enduring value of the conflict perspective while acknowledging its limits.