Fig. 1: National parochialism across nations.
From: National parochialism is ubiquitous across 42 nations around the world
Cleveland dot plot showing the mean of cooperation (in percentage) with ingroup members (red dots) compared to outgroup members and unidentified strangers (green dots) across all the 12 decisions (including both the public and private treatments). Nations are sorted based on their average cooperation levels. The right-side column reports the estimated standardized mean difference (Cohen’s dc) of national parochialism in cooperation. Source data are provided as a Source Data file.
