Slavery does not require chains when a debt never ends.
For most of human history, a debt that could not be repaid did not just sit on a ledger. It converted the debtor’s own body, labor, or family into collateral, a status distinct enough from ordinary borrowing that international law eventually gave it a separate name. The UN’s 1956 Supplementary Convention on the Abolition of Slavery defines debt bondage as the condition arising when a person pledges their personal services, or those of someone under their control, as security for a debt, where the value of that labor is never properly credited against what is owed, or the length and terms of service are left undefined. Unlike an ordinary loan, a debt-bondage arrangement has no built-in exit: the obligation is structured, deliberately or through accumulated interest and fees, so labor can never quite catch up to the sum owed. The International Labour Organization still counts it among the most widespread forms of modern slavery, documented today in brick kilns, agricultural labor, and domestic service across South Asia and beyond.
The economic-slavery framing takes this legal category and applies it as a diagnostic lens above the individual level. A person carrying revolving debt at compounding interest, a business rolling over loans it can only service by taking on more debt, and a country meeting one round of foreign-currency obligations only by borrowing next round’s principal are, on this reading, instances of the same underlying structure debt bondage names: an obligation open-ended enough, and growing fast enough, that output can never fully discharge it. The claim is not that an ordinary mortgage or business loan is legally slavery. It is that the same defining feature, an obligation shaped so that repayment is structurally out of reach rather than merely difficult, is what separates ordinary debt from bondage, whatever scale it operates at.
Historians of the ancient Near East found this pattern repeating badly enough that early states built a release valve into law itself. Assyriologists have documented recurring royal debt amnesties, clean slates and Jubilee-style forgiveness, issued across Sumer, Babylon, and later Israel, specifically because unaddressed debt bondage at scale reliably ended the same way: land concentrating in creditors’ hands, free cultivators reduced to bonded labor, and eventually social collapse the ruling authority had to intervene to prevent. Economist Michael Hudson’s historical account of these cycles argues periodic debt cancellation was not charity but a recognized stabilization tool, evidence that societies have long treated unpayable debt as a structural hazard requiring correction, not simply a moral failing of the debtor to be enforced regardless of consequence.
Source: Supplementary Convention on the Abolition of Slavery, the Slave Trade, and Institutions and Practices Similar to Slavery, United Nations, 1956, Article 1; International Labour Organization, “Modern Slavery: The Concepts and Their Practical Implications” (2022); Michael Hudson, …and forgive them their debts: Lending, Foreclosure and Redemption From Bronze Age Finance to the Jubilee Year (ISLET, 2018).