Professor Emily Kadens counters the argument that the customary law merchant, uniformly and universally adopted across Europe, facilitated international trade.  Professor Kadens attacks two fundamental principles of this law merchant myth: that uniform and universal customary merchant law could have existed and that merchants needed it to exist.  Instead, Professor Kadens argues that merchants largely applied their own customs in medieval commercial transactions but that this usage did not hamper international trade because intermediaries such as brokers ensured that medieval...