Ticking all the boxes? A comparative study of social sorting and affective polarization

This study explores whether, in societies around the world, affective polarization – or animosity between citizens based on their political allegiance – is stronger if political divisions align with non-political ones. Such ‘social sorting’ has earlier been established to foster affective polarization in the United States. In this study, I argue that the underlying mechanism travels across the globe. I then present two complementary studies which confirm this hypothesis. First, I employ CSES data to predict the level of affective polarization by social sorting at 119 elections in 40 countries, showing that greater alignment of partisan divisions with non-political divisions in a society (along the lines of income, education, religion and region) is associated with stronger dislike towards political outgroups. Second, using Dutch panel data, I show that individuals who fit the socio-demographic ‘profile’ of their party better tend to be more affectively polarized. This has important implications for our understanding of affective polarization.