Ademola Abass is a Senior Lecturer in Law at the University of the West of England in Bristol.

This densely constructed and well-written piece of scholarship...truly deserves to be widely read and considered...heralds the coming of a new voice on the scene of public international law, a voice worth considering. Jean Allain Journal of African Law, Vol 50 June 2006 ...Ademola Abass has succeeded in writing an extremely interesting book on a highly relevant and practical subject...it is certainly a merit of the book that it does not merely describe and analyze the current developments but tries to develop innovative approaches which may lead in new directions. Christian Walker German Yearbook of International Law, Vol 48 2005 ...lively and well documented a realistic examination of the evolution of collective security. ASIL Newsletter June 2005 ...an excellent book for those interested in the issue of development of the law and practice of collective security by regional organisations after the Cold War. Emmanouela Mylonaki, University of Bristol African Journal of International and Comparative Law June 2005

• 1 The Meaning of Regionalism2 Regional Organisations and Chapter VIII of the UN Charter3 A Decentralised Enforcement Action: An Evaluation of Surrogate Collective Security under Chapter VII4 Regional Organisations and Residual Responsibility for Collective Security5 Regional Intervention after the Cold War6 Regional Enforcement Action and the Prohibition of the Use of ForceConclusion

Ademola Abass is a Senior Lecturer in Law at the University of the West of England in Bristol.

This densely constructed and well-written piece of scholarship...truly deserves to be widely read and considered...heralds the coming of a new voice on the scene of public international law, a voice worth considering. Jean Allain Journal of African Law, Vol 50 June 2006 ...Ademola Abass has succeeded in writing an extremely interesting book on a highly relevant and practical subject...it is certainly a merit of the book that it does not merely describe and analyze the current developments but tries to develop innovative approaches which may lead in new directions. Christian Walker German Yearbook of International Law, Vol 48 2005 ...lively and well documented a realistic examination of the evolution of collective security. ASIL Newsletter June 2005 ...an excellent book for those interested in the issue of development of the law and practice of collective security by regional organisations after the Cold War. Emmanouela Mylonaki, University of Bristol African Journal of International and Comparative Law June 2005

• 1 The Meaning of Regionalism2 Regional Organisations and Chapter VIII of the UN Charter3 A Decentralised Enforcement Action: An Evaluation of Surrogate Collective Security under Chapter VII4 Regional Organisations and Residual Responsibility for Collective Security5 Regional Intervention after the Cold War6 Regional Enforcement Action and the Prohibition of the Use of ForceConclusion

Ademola Abass is a Senior Lecturer in Law at the University of the West of England in Bristol.

This densely constructed and well-written piece of scholarship...truly deserves to be widely read and considered...heralds the coming of a new voice on the scene of public international law, a voice worth considering. Jean Allain Journal of African Law, Vol 50 June 2006 ...Ademola Abass has succeeded in writing an extremely interesting book on a highly relevant and practical subject...it is certainly a merit of the book that it does not merely describe and analyze the current developments but tries to develop innovative approaches which may lead in new directions. Christian Walker German Yearbook of International Law, Vol 48 2005 ...lively and well documented a realistic examination of the evolution of collective security. ASIL Newsletter June 2005 ...an excellent book for those interested in the issue of development of the law and practice of collective security by regional organisations after the Cold War. Emmanouela Mylonaki, University of Bristol African Journal of International and Comparative Law June 2005

• 1 The Meaning of Regionalism2 Regional Organisations and Chapter VIII of the UN Charter3 A Decentralised Enforcement Action: An Evaluation of Surrogate Collective Security under Chapter VII4 Regional Organisations and Residual Responsibility for Collective Security5 Regional Intervention after the Cold War6 Regional Enforcement Action and the Prohibition of the Use of ForceConclusion