After the Rain: Rainfall Variability, Hydro-Meteorological Disasters, and Social Conflict in Africa

This paper examines the relationship between rainfall, water, and socio-political unrest in Africa. In particular, we are interested in how deviations from normal rainfall patterns, and extreme events such as flooding and drought, affect the propensity for individuals and groups to engage in disruptive activities such as demonstrations, riots, strikes, communal conflict, and anti-government violence. In contrast to much of the environmental security literature, we use a much broader definition of conflict that includes, but is not is not limited to, organized rebellion. Using a new database of over 6,000 instances of social conflict in the past 20 years - the Social Conflict in Africa Database (SCAD) - we examine the effect of deviations from normal rainfall patterns on various types of conflict. Our results indicate that rainfall variability has a significant effect on both large-scale and smaller-scale instances of political conflict. We find that rainfall is correlated with civil war and insurgency, although wetter years are more likely to suffer from violent events. Extreme deviations in rainfall - particularly dry and wet years - are associated with all types of political conflict (violent and nonviolent, government-targeted and non/government-targeted), though the relationship is strongest with respect to violent events, which are more responsive to abundant rather than scarce rainfall. By looking at a broader spectrum of social conflict, rather than limiting the analysis to civil war, we demonstrate a robust relationship between environmental shocks and violence.