Peter Wallensteen is a pioneer in peace research, having worked in the field since the 1960s, and Since 2006 is Richard G. Starmann Sr. Research Professor of Peace Studies at the Kroc Institute at the University of Notre Dame. He was a founder of the Department of Peace and Conflict Research at Uppsala University and the first holder of the Dag Hammarskjöld chair in peace research in Sweden in 1985. He directed the Uppsala Conflict Data Program, which has become a leading provider of data on armed conflict and other forms of organized violence around the world.