Family: Born August 29, 1940, in Penrith, England; son of Michael (a teacher and writer) and Janet (a writer; maiden name, Adam-Smith) Roberts; married Frances Dunn, September 16, 1966; children: Bayard Adam and Hannah Theresa. Education: Magdalen College, Oxford, B.A., 1962, M.A., 1981; London School of Economics and Political Science, studies in international relations, 1965-68. Hobbies and other interests: Rock-climbing, mountaineering. Memberships: International Institute for Strategic Studies, Royal Institute of International Affairs, Fellow British Academy. Addresses: Office: Balliol College, Oxford University, Oxford OX1 3BJ, England.

• (Editor) The Strategy of Civilian Defence: Non-Violent Resistance to Aggression, Faber (London, England), 1967, published as Civilian Resistance As a National Defense, Stackpole (Mechanicsburg, PA), 1968.
• (With Philip Windsor) Czechoslovakia 1968: Reform, Repression and Resistance, Columbia University Press (New York, NY), 1969.
• Nations in Arms: The Theory and Practice of Territorial Defence, Praeger (Westport, CT), 1976, 2nd edition, Macmillan (New York, NY), 1986.
• (With Richard Guelff) Documents on the Laws of War, Oxford University Press (New York, NY), 1982, 3rd edition, 2000.
• (Editor) United Nations Divided World: The UN's Roles in International Relations, Oxford University Press (New York, NY), 1988.
• (Editor) Hugo Grotius and International Relations, Oxford University Press (New York, NY), 1990.
• Civil Resistance in the East European and Soviet Revolutions, Albert Einstein Institution, 1991.
• (Coauthor) Presiding over a Divided World: Changing UN Roles, 1945-1993, L. Rienner Publishers (Boulder, CO), 1994.
• Humanitarian Action in War: Aid Protection and Impartiality in a Policy Vacuum, Oxford University Press (New York, NY), 1996.

Contributor to newspapers and journals, including New Society, World Today, and Survival; also contributor to British Broadcasting Corp.