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Custom And Treaty: A Response To Professor Weisburd, Anthony D'Amato

Vanderbilt Journal of Transnational Law

Arthur M. Weisburd's article, "Customary International Law: The Problem of Treaties", focuses on an important problem that has been relatively overlooked: whether current doctrinal scholarship accords too much weight to treaties as constitutive of customary practice. Few issues in international law are more important than the question of where an international rule comes from and how it is proved. Professor Weisburd has addressed a significant component of this basic question. Since he regards me as the leading offender among writers who overdetermine the value of treaties, I would like to take this opportunity to respond.

As a preliminary matter, I …