<p>This paper explores the relationship between geographic mortality differentials and human capital investment patterns in the Malthusian setup of 19th-century Armenia. We examine how variations in altitude are associated with mortality rates, human capital accumulation, and fertility decisions. Using detailed historical census and parish records, we document that higher-altitude areas tend to have lower population density, lower respiratory disease mortality, and lower overall mortality. Our empirical analysis also shows that individuals in these environments tend to display better numeracy skills and lower fertility rates. These findings align with the Ben-Porath hypothesis, suggesting that longer life horizons encourage shifting from child quantity to quality. Furthermore, these patterns are not driven by income differences or increased female autonomy arising from pastoral agriculture.</p>