Peter Wallensteen, born 29 July 1945 in Stockholm, is a peace and conflict researcher in Sweden, now Senior Professor in Peace and Conflict Research at Uppsala University. He was the first holder of the Dag Hammarskjöld Chair in Peace and Conflict Research at Uppsala University, 1985-2012. He was the Richard G. Starmann Sr. Research Professor of Peace Studies, at the Kroc Institute for International Peace Studies at University of Notre Dame (Indiana, USA), 2006-2018. From 1972 to 1999 he directed the Department of Peace and Conflict Research at Uppsala University.
https://en.wikipedia.org/wiki/Peter_Wallensteen