The geography of literacy: Understanding poleward increases in literacy rates

Asian social psychology has often focused on East/West comparisons. However, a latitudinal psychology perspective suggests that cultures will vary in predictable ways along north/south (latitudinal) gradients, rather than along east/west (longitudinal) gradients. We apply this perspective to better understand the geographical placement of literacy rates across the world. We find across 206 nations that latitude shows no linear relationship with worldwide literacy rates, but a significant curvilinear relationship, such that as one moves north from the equator, higher latitudes are associated with more literacy, whereas this relationship reverses as one moves south from the equator. No such curvilinear relationship consistently emerged for longitude. To better understand the geography of literacy, we included four potential explanatory socioecological variables (pathogens, climate, national tightness, and wealth). These analyses revealed that increases in literacy as one moves towards the North and South Poles was partially accounted for by all four variables, but a larger portion of the variance was due to pathogens. These results suggest that latitude—which, taken on its own, is just a set of abstract lines on a map—can help us organize and understand global literacy.