Ibn Khaldun

By Lucía Cárdenas

Ibn Khaldun lived the collapse he theorized. Born in Tunis in 1332 into a family of Andalusian scholars, he served as courtier, judge, and diplomat across a North Africa torn by plague, war, and palace coups — he lost his parents to the Black Death, was imprisoned for plotting, exiled, recalled, and exiled again. At forty-three, exhausted by intrigue, he withdrew to a fortified monastery in the Algerian hills and spent four years writing. The result was the Muqaddima — the 'Introduction' to his universal history — a book that invented two sciences at once and had to wait five centuries to be understood.

Its engine is asabiyyah, usually translated as group solidarity: the fierce cohesion of desert tribesmen that lets them conquer cities, and the softening of that cohesion, generation by generation, once they taste luxury. Khaldun gives dynasties a lifespan — three to four generations, roughly 120 years — from the hungry founders who share hardship to the pampered heirs who tax their subjects to pay for palaces, until a new hungry tribe from the desert starts the cycle again. It is the first theory of the rise and fall of states built on economics and sociology rather than on the virtues of princes.

The economics inside it is startling. Khaldun argues that all value comes from labor: 'profit is the value realized from labor,' and crafts gain their worth from the work embodied in them — a labor theory of value four hundred years before Ricardo. He describes the division of labor, the productivity of cities, and the role of luxury demand in stimulating crafts. And he states, six centuries before Arthur Laffer drew his curve on a napkin, that low taxes encourage enterprise and yield the ruler more revenue, while high taxes crush production and leave the treasury empty. Excessive taxation, he writes, destroys the incentive to work — and with it, civilization itself.

Arnold Toynbee called the Muqaddima 'the greatest work of its kind that has ever yet been created by any mind in any place or time.' Khaldun anticipated Durkheim on social cohesion, Weber on the state, Malthus on population pressure, and Smith on the division of labor — and bound them into a single system. He wrote as the medieval world was dying around him; modern social science is still catching up to what he saw.

No medieval thinker, East or West, thought on this scale.

Impact on civilization

Ibn Khaldun is now recognized as the founder of sociology — Durkheim, Weber, and the whole discipline walk a road he surveyed first — and as the first systematic economist of the pre-modern world. His tax doctrine, that moderate rates maximize revenue, is the ancestor of supply-side economics and is cited in treasury debates to this day. His cycle of dynasties gave Arab historiography its master framework and gave modern development economics a vocabulary for state failure: predatory taxation, luxury consumption by elites, the decay of institutions. The Muqaddima's rediscovery by European scholars in the nineteenth century forced the history of economic thought to be rewritten with a non-European origin point — proof that the deepest questions of political economy were asked in Tunis four centuries before they were asked in Glasgow. His work is now taught as the founding text of historical sociology, and Arab intellectuals from Taha Hussein to the present claim him as proof that social science has non-Western roots.