This study estimates the predicted impact of climate change on levels of violence in a sample of 57 countries. We sample western and non-western countries and perform a multilevel ARFIMA regression to examine if warmer temperatures are associated with higher levels of homicide. Our results indicate that each degree Celsius increase in annual temperatures is associated with a nearly 6% average increase in homicides. Regional variation in this predicted effect is detected, for example, with no apparent effects in former Soviet countries and far stronger effects found in Africa. This variation indicates that climate change may acutely increase violence in areas that already are affected by higher levels of homicides and other social dislocations.
Mares, Dennis and Kenneth W. Moffett Forthcoming.Climate Change and Interpersonal Violence: A "Global" Estimate and Regional Inequities. Climatic Change.