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A connection between disasters and political unrest has often been suggested, but only case studies/anecdotes have been offered as evidence. To test statistically for a disaster‐political unrest relationship, a causal model is developed that posits a direct and positive linkage between disaster severity and ensuing levels of political unrest. The model further specifies that increased levels of development, income equality, and regime repressiveness dampen post‐disaster political unrest. Using a time‐series between 1966 and 1980, Poisson regression results strongly corroborate the model. The exception is income equality, which has the opposite of the originally hypothesized effect.
Drury et al. (Tue,) studied this question.