Inclusivity norms counter the negative societal effects of opinion polarization across 12 European countries

Sharp disagreements about social issues have raised concerns about increasing societal polarization in democracies worldwide. While diversity of opinion is vital for democratic engagement and can promote innovative solutions, social science research shows that such disagreements can undermine social cohesion and erode social trust if they turn into identity-based conflicts. The present research examines the potential of norms that promote equality-based respect, dialogue, and unity (inclusivity norms) in mitigating these negative outcomes. In a pre-registered representative survey of 12,041 individuals in twelve European countries, we find that perceived inclusivity norms are associated with increased tolerance, greater willingness to collaborate, and lower tendencies to avoid people who hold opposing opinions. In most countries studied, this pattern holds for respondents with high levels of disapproval of the opposing viewpoint and stronger identification with their opinion-based group relative to society. These findings support the potential of inclusivity norms to preserve social trust and cohesion amid opinion diversity.