The Nature of Interest and Usury: Recursive Symbolic Amplification, Civilizational Acceleration, and the Ontology of Money

Mainstream economics treats interest as a neutral instrument: the cost of capital, compensation for delayed consumption, or a premium attached to risk. Religious prohibitions against usury, by contrast, are often interpreted within modern discourse as inherited moral constraints — intelligible within premodern contexts but increasingly viewed as incompatible with industrial and financial complexity. This paper argues that both framings miss the point. Interest is not primarily a price or a moral category; it is a structural transformation in the ontology of money. Money emerges as a stabilizing symbolic technology that allows exchange, coordination, and retention across societies too large for direct reciprocity. Interest alters its behavior fundamentally: it converts money into a recursively self-expanding claim operating through time itself. Wealth then grows not chiefly through productive participation or shared risk, but through the autonomous compounding of symbolic claims upon future activity. Usury, on this account, is not categorically distinct from interest. It is the terminal tendency of recursive symbolic accumulation under competitive conditions of scale. From this premise the paper develops a wider thesis: growth dependency, financialization, ecological overshoot, housing detachment, and proxy governance are not isolated policy failures but systemic consequences of recursive accumulation. Compounding obligations require expansion sufficient to stabilize claims already projected into the future. Production, extraction, and institutional life reorganize themselves around that requirement. A historical chapter examines Islamic civilization as a counterexample: large-scale trade, urbanization, and scientific development without making interest-centered accumulation the primary engine. The paper engages Timur Kuran's competing reading of the same history directly, rather than around it. The eventual divergence with the West is attributed not to moral or intellectual superiority but to a particular convergence of industrial finance, colonial extraction, recursive capital expansion, and the institutional re-engineering of slavery into the chattel form the prior dominant legal order had specifically excluded — together producing an acceleration architecture without historical precedent. The bullion shock following the conquest of the Americas is examined as one mechanism through which this acceleration reorganized the commercial environment within which Islamic civilization had operated. The paper exposes its central claims to evidence through a two-layer predictive structure. A strong civilizational claim holds that recursive accumulation cannot sustain bounded reciprocity indefinitely without dependence on continual growth, external extraction, periodic restructuring, or rising abstraction pressure. Five operational predictions then specify what would be observable in long-run data on recursively accumulative economies, and an appendix tests these predictions against the Japanese case from 1955 to 2025, where four of five hold cleanly and the fifth holds in a qualified form that confirms the framework's broader claim about administered stabilization. The closing argument is that the central problem confronting modernity is not abstraction itself but the transition from bounded symbolic mediation to recursively autonomous accumulation. The paper sketches what re-embedding money within reciprocity, distributed mediation, and risk-sharing might look like under a framework of layered reconstruction.