Since the beginning of the American Republic, a package of norms has evolved in the U.S. Constitution to protect the operation of checks and balances in national security policy. This “National Security Constitution” promotes shared powers and balanced institutional participation in foreign policymaking. Today it is under attack from a competing claim of executive unilateralism generated by recurrent patterns of presidential activism, congressional passivity, and judicial tolerance. This dynamic has pushed presidents of both parties to press the limits of law in foreign affairs.

In his award-winning National Security Constitution (1990), Harold Hongju Koh traced the evolution of this constitutionalstruggle across America’s history. This new book brings the story to the present, placing recent events into constitutional perspective and explaining why modern national security threats have given presidents of both parties incentives to monopolize foreign policy decision-making, Congress incentives to defer, and the courts reasons to rubber-stamp. Koh suggests both a workable strategy and crucial prescriptions to restore the balance of our constitutional order in addressing modern global crises.

Harold Hongju Koh is Sterling Professor of International Law and former dean at Yale Law School, and former State Department Legal Adviser and Assistant Secretary of Human Rights. He has received eighteen honorary degrees, more than thirty human rights awards, and prizes from Columbia and Duke Law Schools and the American Bar Association for his lifetime achievements in international law. He is the author of nine books, including The National Security Constitution.

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