Article révisé par les pairs
Résumé : Do mutually reinforcing cleavages harm democracy? Evidence from specific cases suggests that autocratization can be related to the predicament of ethnic groups, if ethnicity is politicized and involves resource distribution. However, we know little about whether this is a cause of autocratization more broadly. The article demonstrates that, with increasing inequalities between ethnic groups, a country experiences a decline in its level of democracy and higher propensity to start autocratizing. The analysis thus advances previous contributions, focusing on individual inequalities and power-sharing institutions as explanations of democratization or democratic quality, in two ways. First, isolating autocratization as downturns in democracy levels and the onsets of related timespans (autocratization episodes), and comparing the impact of (economic, political, and social) types of inequalities between ethnic groups. Second, adopting a global sample of (democratic and non-democratic) countries since 1981, with an original data collection integrating expert surveys with survey data. Quantitative evidence confirms most expectations, particularly on economic inequalities between ethnic groups, and – although less precisely – economic, political and social dimensions combined. The findings have important implications for political regime and ethnic studies, showing that preventing the mutual reinforcement of sociocultural and economic cleavages is key to stabilize democracy.