Nils Petter Gleditsch (born 17 July 1942 in Sutton, Surrey, Great Britain) is a Norwegian sociologist and political scientist.
[2] In 1982 he was convicted in Norway of a violation of the national security paragraphs of the penal code, in the Wilkes/Gleditsch trial.
In 1966-67 he read sociology, social psychology and international relations at the University of Michigan in United States.
From 2002-2008 he led the working group 'Environmental Factors of Civil War' at PRIO's Centre for the Study of Civil War, appointed Centre of Excellence by the Research Council of Norway.
Gleditsch was editor of Journal of Peace Research 1983–2010, succeeded by Henrik Urdal.