Hendrix, Cullen; Scott Gates & Halvard Buhaug (2016) Environment and Conflict, in Mason, T. David; & Sara McLaughlin Mitchell, eds, What Do We Know About Civil Wars?. Lanham, MD: Rowman & Littlefield (231–246).
Since World War II, civil wars have replaced interstate wars as the most frequent and deadly form of armed conflict globally. A new book, What Do We Know about Civil Wars? is edited by T. David Mason & Sarah McLaughlin Mitchell, and has several contributions from present and former PRIO researchers, all connected to PRIO's Centre for the Study of Civil War (2002-2012).