In this paper, I examine the relationship between community-level exposure to war losses and long-term patterns of electoral behaviour. Using novel data that identifies and geolocates all French soldiers who died during World War I, I show that communities that experienced higher death rates exhibit greater levels of electoral support for the far-right. Subsequently, I provide both theoretical and empirical evidence on how such persistent effects propagate: communities more exposed to the horrors of war develop stronger in-group preferences at the expense of the out-group. In cases like France, where the in-group is defined primarily in terms of the nation, this preference translates into a higher demand for nationalism, which is supplied by far-right political parties.

This paper investigates the long-term impact of historical missionary activity on HIV in sub-Saharan Africa. On the one hand, missionaries were the first to invest in modern medicine in the region. On the other hand, Christianity influenced sexual beliefs and behaviors that affect the risk of contagion. We build a new geocoded dataset locating Protestant and Catholic missions in the early 20th century, as well as the health facilities they invested in, that we combine with individual-level Demographic and Health Survey data. With these data, we can address separately these two channels, within regions close to historical missionary settlements. First, we show that proximity to historical missionary health facilities decreases the likelihood of HIV; persistence in healthcare provision and safer sexual behaviors in the region explain this result. Second, we show that regions close to historical missionary settlements exhibit higher likelihood of HIV. This effect is driven by the Christian population in our sample. This suggests conversion to Christianity as a possible explanatory channel. Our findings are robust to alternative specifications addressing selection.