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Much has been written about the global convergence on constitutional supremacy, and the corresponding rise of an apparently universal constitutional discourse, primarily visible in the context of rights. In this Paper, we examine the global constitutional homogeneity claim with respect to economic and social rights. Based on a new and unique dataset that identifies the status of sixteen distinct economic and social rights in the world's constitutions (195 in total), we make four arguments. First, although economic and social rights (ESRs) have grown increasingly common in national constitutions, not all ESRs are equally widespread. Whereas a right to education is so common as to be practically universal, a right to food and water is still very rare. Second, constitutions accord ESRs different statuses, or strengths. More than some one-third of countries identify all economic and social rights as justiciable, another third identify some ESRs as aspirational and some as justiciable, and the last third identify ESRs as aspirational or entrench fewer than two. Third, legal tradition— whether a country has a tradition of civil, common, Islamic, or customary law— is a strong predictor of whether a constitution will have economic and social rights and whether those rights will be justiciable. Fourth, whereas regional differences partly confound the explanatory power of legal traditions, region and legal tradition retain an independent effect on constitutional entrenchment of ESR. We conclude by suggesting that despite the prevalence of economic and social rights in national constitutions, as of 2013 there is still considerable variance with respect to the formal status, scope and nature of such rights. Because the divergence reflects lasting determinants such as legal tradition and region, it is likely to persist.
