Born in 1934. Studied Economics and Political Science at Cologne University 1954-58, Degree of Diplom-Kaufmann.

Graduate studies at University of Grenoble, 1958-59 (D.E.S. de Science Politique) and Oxford University (Nuffield College), 1960-63. Simultaneously Doctoral dissertation on British Policy on European Integration at Cologne
University (Dr.rer.pol. in 1963).

Harvard University, first working for Henry Kissinger, then as Research Associate at the Center for International Affairs, Head Tutor in Social Studies and Lecturer in Government, 1963-68. Return to Harvard as Visiting Professor several times in later years.

Professorships at Johns Hopkins University in Bologna (Italy), Universities of Saarbruecken, Cologne, Florence, Bonn and Jerusalem.

Otto-Wolff-Director of the German Council on Foreign Relations Bonn/Berlin 1973-2003

2003/4 Visiting Scholar and 2004/5 Ralph Strausz Visiting Professor, Weatherhead Center for International Affairs, Harvard University

2005-2015 Adjunct Professor of Public Policy, Harvard Kennedy School and Director of the Program on Transatlantic Relations, Weatherhead Center for International Affairs, Harvard University

Member of the Federal Commission for the Reform of the Federal Armed Services, Member of the Council of Environmental Advisors of Germany, Expert member of several commissions of enquiry of the German Parliament, Testimonials in the German and Dutch Parliaments, the US Senate Armed Services Committee and the House Subcommittee on European Affairs of the US Congress.

Occasional Political Advisor to Chancellors Willy Brandt, Helmut Schmidt, and to Foreign Minister Hans-Dietrich Genscher.

Author/editor of several hundred articles and fifty books in the fields of world affairs, German, French, British and US foreign policy, East-West relations, Nuclear Proliferation, strategic theory, international economics, international environmental policy. His latest book: Coed. with J.D. Bindenagel /Matthias Herdegen, Sicherheit im 21. Jahrhundert,  Deutschlands internationale Verantwortung, Bonn: V&R unipress/Bonn University Press. 2016; revised Englishe version: International Security in the 21st Century. Germany's International Responsibility, same publisher 2017.

Honors: Honorary Doctor of the Russian Academy of Sciences, Prix Bentinck, Atlantic Award of NATO, Member of the American Philosophical Society; CBE (UK), Order of Merit (Germany), Légion d'Honneur, Officier (France), Order of Merit (Poland), Order of Merit (Spain).

Present Position: Senior Associate, Project on Europe and the Transatlantic Relationship, Belfer Center for Science and International Affairs, Adjunct Professor of Public Policy emeritus, John F. Kennedy School of Government, Harvard University.