A growing body of research suggests that populations around the globe vary substantially along several important psychological dimensions and that populations characterized as Western, Educated, Industrialized, Rich, and Democratic (WEIRD) are particularly unusual. People from these societies tend to be more individualistic, independent, and impersonally prosocial (e.g., trusting of strangers) while revealing less conformity and in-group loyalty. Although these patterns are now well documented, few efforts have sought to explain them. Here, we propose that the Western Church (i.e., the branch of Christianity that evolved into the Roman Catholic Church) transformed European kinship structures during the Middle Ages and that this transformation was a key factor behind a shift towards a WEIRDer psychology.
That is a new piece in Science by Jonathan F. Schulz, Duman Bahrani-Rad, Jonathan P. Beauchamp, and Joe Henrich, try this link too. This one works for sure. Here is Harvard magazine coverage of the piece. Here is a relevant Twitter thread.
The two Jonathan co-authors are new colleagues of mine at GMU economics, so I am especially excited this work is seeing the light of day in such a good venue.