Alfred Sohn-Rethel’s Intellectual and Manual Labour constitutes one of the most radical attempts within Western Marxism to reconstruct the historical genesis of abstract thought through the material operations of commodity exchange rather than through the autonomous evolution of consciousness. Rejecting the philosophical orthodoxy according to which abstraction is exclusively a mental act, Sohn-Rethel argues that abstraction first emerges practically and socially within the exchange relation itself. Commodity exchange, he contends, requires participants to suspend the concrete use-values of objects in favour of their equivalence as exchange-values; this operation produces what he famously terms “real abstraction”—an abstraction enacted materially through social practice before it becomes conceptualised in thought. The decisive implication is that the formal categories of epistemology, including abstraction, quantification, causality, spatiality, and temporality, originate not in transcendental consciousness, as maintained by Kant, but in historically specific relations of exchange embedded within class society. Sohn-Rethel therefore interprets philosophy, mathematics, and scientific rationality as intellectual superstructures corresponding to the social synthesis generated by commodity circulation. His analysis further links this epistemological formation to the historical division between intellectual and manual labour, arguing that the separation of head from hand becomes institutionalised through systems of appropriation and class domination extending from antiquity to monopoly capitalism. Particularly striking is his claim that the very possibility of “pure thought” depends upon material social relations which conceal their own historical origins. By tracing scientific cognition back to the exchange abstraction, Sohn-Rethel transforms Marx’s critique of political economy into a critique of epistemology itself, thereby exposing modern reason as inseparable from the fetishistic structures of capitalist sociality. Ultimately, the text proposes that a genuinely classless society would require not merely economic transformation but the historical overcoming of the epistemic rupture between conceptual labour and practical production.
Sohn-Rethel, A. (1978) Intellectual and Manual Labour: A Critique of Epistemology. Atlantic Highlands, NJ: Humanities Press.
