| Boston Tech Hub Faculty Working Group, Harvard University, 2019–. |
| Founding Board Member of Artificial Intelligence World Society, 2018–. |
| Board Member, Boston Global Forum, 2017–. |
| Institute of Electrical and Electronics Engineers, 2015–. |
| Council of Scientific Society Presidents Committee on Creative Heuristics Enabling Strategic Success (C.H.E.S.S.), 2015–2018. |
| Centre national de la recherche scientifique, France, Carbon Promenades, August 2015. |
| Scientific Advisory Committee to World Social Science Report (WSSR), 2013. |
| Science Board, Santa Fe Institute, 1995–2001, and 2012–2018. |
| Chair, Scientific Advisory Committee (SAC) of UNESCO Program Management of Social Transformation (MOST), 2009–2014. |
| Working Group 3, UN-ICT,Preparations for World Summit on Information Technology, 2001–2005. |
| Contributor to US Academy of Engineering study on Information Systems and the Environment 1997, published in 2001. |
| Panel Member, DARPA-National Academy of Sciences Committee on Understanding Terrorism in order to Deter Terrorism, 2001–2002. |
| Member, Scientific Advisory Committee, SCOPE-ICSU, 1998 . |
| Special Advisor to the Administrator of the United Nations Development Program, 1994–1996. |
| Advisory Board, Global Stewardship Initiative, Pew Charitable Trust, 1993–1995. |
| Advisor to the Secretary General for United Nations Conference on Environment and Development, 1990–1992. |
| Member, AAAS Committee on Population, Resources, and the Environment Chair, Working Group on International Aspects, 1990–1992. |
| Convener and Session Organizer, International Political Science Association, 1984–1985. |
| Planning Committee, International Scientific Forum on Energy, 1983–1988. |
| Advisory Committee, Office of Technology Assessment, U.S. Congress, 1982–1983. |
| Board of Directors, Pathfinder Fund, 1981–1983. |
| Council Member, American Political Science Association, 1981–1983. |
| Panel for 1979 U.S. Conference of Science and Technology for Development, National Research Council, 1977–1978. |
| International Advisory Committee, World Population Society, 1976–1977. |
| International Social Science Documentation Committee, 1976–1978. |
| Advisory Committee, Developing Guidelines of Research on National Resource Problems, 1973–1974. National Science Foundation. |
| Co-Chair, Middle East Workshop, 1973–1974. National Academy of Sciences. |
| International Committee of Advisors, Population Issues, 1972–1974. National Academy of Science |
