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Mandatory Cooperation Under International Law

Mandatory Cooperation Under International Law

Mandatory Cooperation Under International Law

Evan J. Criddle , College of William and Mary, Virginia
Evan Fox-Decent , McGill University, Montréal
February 2026
Not yet published - available from February 2026
Hardback
9781009305020

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    Humanity in the twenty-first century faces serious global challenges and crises, including pandemics, nuclear proliferation, violent extremism, refugee migration, and climate change. None of these calamities can be averted without robust international cooperation. Yet, national leaders often assume that because their states are sovereign under international law, they are free to opt in or out of international cooperation as they see fit. This book challenges conventional wisdom by showing that international law requires states to cooperate with one another to address matters of international concern-even in the absence of treaty-based obligations. Within the past several decades, requirements to cooperate have become firmly embedded in the international legal regimes governing oceans, transboundary rivers, disputed territories, pollution, international security, and human rights, among other topics. Whenever states address matters of common concern, international law requires that they work together as good neighbors for their mutual benefit. This title is also available as Open Access on Cambridge Core.

    • Develops a theory of mandatory cooperation, which clarifies time when cooperation is obligatory under general international law
    • Specifies the substantive and procedural requirements associated with mandatory cooperation, providing a clear roadmap for national authorities to comply with international law and supplying scholars with criteria for evaluating state action
    • This title is also available as Open Access on Cambridge Core

    Reviews & endorsements

    ‘Criddle and Fox-Decent suggest an intriguing possibility: that over the last century an obligation of cooperation has emerged in international law, an obligation that permeates international law today. Required reading in daunting times.' Frédéric Mégret, Professor and Hans & Tamar Oppenheimer Chair in Public International Law, McGill University

    ‘Exhibiting an impressive breadth of historical and legal scholarship, Criddle and Fox-Decent's carefully argued account of international law inspires at a time when hope is in high demand but in short supply.' Andreas Føllesdal, Professor of Political Philosophy, University of Oslo

    See more reviews

    Product details

    February 2026
    Hardback
    9781009305020
    234 pages
    229 × 152 mm
    Not yet published - available from February 2026

    Table of Contents

    • 1. Introduction: from sovereign equality to mandatory cooperation
    • Part I. Conflicting Sovereignties:
    • 2. Rivers
    • 3. Oceans
    • 4. Landlocked states
    • 5. Pirates, terrorists, and hackers
    • 6. Pollution
    • Part II. Collective Stewardship:
    • 7. Climate change
    • 8. Common and disputed territories
    • 9. Peace, security, and human rights
    • Part III. Future Directions:
    • 10. Refugees
    • 11. Extraterritorial lawmaking
    • 12. Mandatory dispute resolution
    • 13. Conclusion
    • Index.
      Authors
    • Evan J. Criddle , College of William and Mary, Virginia
    • Evan Fox-Decent , McGill University, Montréal