Assyrian merchants built their own court in Kanesh

Around 1900 BCE, merchants from the Assyrian city of Aššur ran a long-distance trade network carrying tin and textiles roughly 700 miles across Anatolia to Kanesh, near modern Kültepe, Turkey — a journey of weeks through territory controlled by local Anatolian kings who had no interest in enforcing an Assyrian merchant's contract against another Assyrian, or against a local debtor. There was no shared king, no shared court, and no mechanism to compel payment on a loan, resolve a partnership dispute, or punish fraud between traders operating that far from Aššur's own jurisdiction.

Rather than trade only on trust within small family networks, or refuse to extend credit at all without enforceable recourse, the Assyrian merchant community resident at Kanesh built its own institution to fill the gap: a self-governing trading colony, the karum, with an assembly of the community's own senior merchants sitting as its governing and judicial body.

Built their own court: senior merchants adjudicated disputes and enforced credit, filling the legal vacuum with self-governance and a cuneiform record.

Senior merchants had local standing and knowledge, so their rulings carried weight.

Documenting contracts and rulings on tablets created a durable, referenceable legal record.

Reputation and exclusion gave the court power without state backing.

Community cohesion and repeated interaction made peer enforcement effective.

When formal law can't reach, build a peer-run institution with local standing and reputation-based enforcement.

The karum system operated continuously for generations as the practical legal infrastructure for the Old Assyrian trade network, and its record survives in extraordinary depth: more than 23,000 cuneiform tablets recovered from Kültepe document the colony's day-to-day contracts, credit arrangements and dispute rulings, making it one of the best-documented private commercial legal systems from the ancient world.