Since the third wave of democratization, specialized constitutional courts have spread widely across developed and developing countries and become key to government accountability, rights protection, and cross-institutional conflict resolution. Simultaneously, nearly half of all constitutional court adoptions have occurred in Europe. What explains the global, yet Eurocentric, spread of constitutional courts? Countries’ institutional endowments, particularly domestic and international legal institutions, are key to this crucial choice of constitutional design. Common law countries are less likely to establish specialized constitutional courts than their civil law counterparts due to their domestic legal system’s relatively weaker affinity with the constitutional court model. Furthermore, the Council of Europe’s Venice Commission—the main international organization specifically promoting constitutional courts—has catalyzed their wide and rapid spread especially, but not exclusively, in Europe. Our theory gains robust support from event history analyses of 172 developed and developing countries from 1947 to 2019.
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