How did Karl Llewellyn's study of business disputes connect court decisions with commercial customs?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

The Greek philosopher Plato — Philosophy of law Plato, marble portrait bust copied from an original of the 4th century bce; in the Capitoline Museums, Rome.

Karl Llewellyn, a central figure in American legal realism, argued that judicial decisions in business law are often driven by prevailing commercial norms rather than strictly by formal legal rules.1

Llewellyn observed that while legal sources like statutes and precedent are often indeterminate, judicial outcomes follow predictable patterns based on the underlying "situation-type" or mercantile practice. He demonstrated this by analyzing cases where courts appeared to apply rules harshly. For instance, in New York cases regarding the rejection of shipments, judges invoked strict rules about waiving objections not because the rules themselves dictated the outcome, but to prevent buyers from escaping contracts when market conditions soured.1

By enforcing the commercial norm that buyers should honor their commitments, judges acted as arbiters of "decency" within the business culture. Llewellyn’s study emphasized that to understand decision making, one must look beyond the text of the law to the background facts of commercial life and the social context in which disputes arise.1