Security in Disarmament, co-edited with Richard J. Barnet, (Princeton University Press, 1965).
The Aftermath of Sabbatino: Background Papers and Proceedings of the Seventh Hammarskjold Forum, co-edited with Lyman M Tondel, Jr., (Oceana Publications, 1965).
The Strategy of World Order, vol. 1: Toward a Theory of War Prevention, co-edited with Saul H. Mendlovitz, (World Law Fund, 1966).
The Strategy of World Order, vol. 2: International Law, co-edited with Saul H. Mendlovitz, (World Law Fund, 1966).
The Strategy of World Order, vol. 3: the United Nations, co-edited with Saul H. Mendlovitz, (World Law Fund, 1966).
The Strategy of World Order, vol. 4: Disarmament and Economic Development, co-edited with Saul H. Mendlovitz, (World Law Fund, 1966).
International Law and Organization: An Introductory Reader, co-edited with Wolfram F. Hanrieder, (J. B. Lippincott, 1968).
The Future of the International Legal Order, 4 vols., co-edited with Cyril E. Black, (Princeton University Press, 1969).
Crimes of War: A Legal, Political-documentary, and Psychological Inquiry into the Responsibility of Leaders, Citizens, and Soldiers for Criminal Acts in Wars, co-edited with Gabriel Kolko and Robert Jay Lifton, (Random House, 1971).
Regional Politics and World Order, co-edited with Saul H. Mendlovitz, (W. H. Freeman, 1973).
The War System: An Interdisciplinary Approach, co-edited with Samuel S. Kim, (Westview Press, 1980).
Basic Documents in International Law and World Order, co-edited with Burns H. Weston and Anthony A. D'Amato, (West Pub. Co., 1980).
Toward a Just World Order, co-edited with Samuel S. Kim and Saul H. Mendlovitz, (Westview Press, 1982).
International Law: A Contemporary Perspective, co-edited with Friedrich Kratochwil and Saul H. Mendlovitz, (Westview Press, 1985).
Dealignment: A New Foreign Policy Perspective, co-edited with Mary Kaldor, (Basil Blackwell, 1987).
The New Detente: Rethinking East-West Relations, co-edited with Mary Kaldor and Gerard Holden, (Verso, 1989).
The United Nations and a Just World Order, co-edited with Samuel S. Kim and Saul H. Mendlovitz, (Westview Press, 1991).
Postmodern Politics for a Planet in Crisis: Policy, Process, and Presidential Vision, co-edited with David Ray Griffin, (State University of New York Press, 1993).
The Constitutional Foundations of World Peace, co-edited with Robert C. Johansen and Samuel S. Kim, (State University of New York Press, 1993).
A New Europe in the Changing Global System, co-edited with Tamas Szentes, (United Nations University Press, 1997).
Reframing the International: Law, Culture, Politics, co-edited with Lester Edwin J. Ruiz and R.B.J. Walker, (Routledge, 2002).
Human Rights: Critical Concepts in Political Science, 5 vols., co-edited with Hilal Elver and Lisa Hajjar, (Routledge, 2007).
At the Nuclear Precipice: Catastrophe or Transformation?, co-edited with David Krieger, (Palgrave, 2008).
International Law and the Third World: Reshaping Justice, co-edited with Balakrishnan Rajagopal and Jacqueline Stevens, (Routledge, 2008).