Examining onsets of political instability in countries worldwide from 1955 to 2003, we develop a model that distinguishes countries that experienced instability from those that remained stable with a two-year lead time and over 80% accuracy. Intriguingly, the model uses few variables and a simple specification. The model is accurate in forecasting the onsets of both violent civil wars and nonviolent democratic reversals, suggesting common factors in both types of change. Whereas regime type is typically measured using linear or binary indicators of democracy/autocracy derived from the 21-point Polity scale, the model uses a nonlinear five-category measure of regime type based on the Polity components. This new measure of regime type emerges as the most powerful predictor of instability onsets, leading us to conclude that political institutions, properly specified, and not economic conditions, demography, or geography, are the most important predictors of the onset of political instability.
Przeworski et al. (2000) challenge the key hypothesis in modernization theory: political regimes do not transition to democracy as per capita incomes rise, they argue. Rather, democratic transitions occur randomly, but once there, countries with higher levels of GDP per capita remain democratic. We retest the modernization hypothesis using new data, new techniques, and a three-way rather than dichotomous classification of regimes. Contrary to Przeworski et al. (2000) we find that the modernization hypothesis stands up well. We also find that partial democracies emerge as among the most important and least understood regime types.
Przeworski et al. (2000) challenge the key hypothesis in modernization theory: political regimes do not transition to democracy as per capita incomes rise, they argue. Rather, democratic transitions occur randomly, but once there, countries with higher levels of GDP per capita remain democratic. We retest the modernization hypothesis using new data, new techniques, and a three-way rather than dichotomous classification of regimes. Contrary to Przeworski et al. (2000) we find that the modernization hypothesis stands up well. We also find that partial democracies emerge as among the most important and least understood regime types.
Third-generation theories of revolution pointed to the structural vulnerabilities of regimes as the basic causes of revolutions. In the last decade, critics of structural theories have argued for the need to incorporate leadership, ideology, and processes of identification with revolutionary movements as key elements in the production of revolution. Analyses of revolutions in developing countries and in communist regimes have further argued for incorporating these factors and for the inadequacy of structural theories to account for these events. Rather than try to develop a list of the "causes" of revolutions, it may be more fruitful for the fourth generation of revolutionary theory to treat revolutions as emergent phenomena, and to start by focusing on factors that cement regime stability. Weakness in those factors then opens the way for revolutionary leadership, ideology, and identification, along with structural factors such as international pressure and elite conflicts, to create revolutions.
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