The article discusses how our understanding of dog-human bonds, dog behavior, and dog cognition is limited to Western, Educated, Industrialized, Rich, Democratic (WEIRD) societies, and the question of whether associations between dogs and humans are representative worldwide. The study collected data on the function and perception of dogs in 124 globally distributed societies using the eHRAF cross-cultural database. The results showed that keeping dogs for multiple purposes and/or employing dogs for highly cooperative or high investment functions is associated with closer dog-human bonds, increased primary caregiving, decreased negative treatment, and attributing personhood to dogs. The study challenges the notion that all dogs are the same and opens questions about how function and associated cultural correlates could fuel departures from the ‘typical’ behavior and social-cognitive skills we commonly associate with our canine friends.

Jared Diamond previously argued that the East-West orientation of Eurasia allowed for the spread of substantial cultural, political, technological, and military innovations, due to environmental homogeneity across the continent. The authors of this article test this theory through quantitative analyses. Their results suggest that ecology can indeed influence the potential for cultural transmission, consistent with Diamond's theory. However, the authors do not find support for Eurasia having lower environmental barriers to cultural transmission in comparison to other continents.