The Fable of the Leeches: Why Economists Are Wrong to Assume Markets Require Contract Enforcement

https://www.youtube-nocookie.com/embed/oWh9TPm1tyo

Further reading:

Private Governance: Creating Order in Economic and Social Life by Edward P. Stringham

Order without Law: How Neighbors Settle Disputes by Robert C. Ellickson

Privatizing the Adjudication of Disputes by Bryan Caplan & Edward P. Stringham