Regions of the world with the highest historical risk of deadly diseases produce people with the most positive views about the future of humanity.
April 23, 2026
Original Paper
Beliefs About a Brighter Future for All Humanity as an Evolutionary Adaption to Pathogen Prevalence
SSRN · 6505340
The Takeaway
Populations living in areas once ravaged by pathogens show a significantly higher level of optimism about long-term human progress. Modern logic suggests that a history of suffering and death would leave a culture cynical or fearful. The data reveals that high disease prevalence likely triggered an evolutionary adaptation to maintain hope and social cohesion under extreme stress. This biological drive for optimism helps communities survive and rebuild even when the environment is objectively dangerous. Understanding this link changes how experts view cultural resilience and the psychological impact of global health crises.
From the abstract
<p><span>An important question in cognitive and evolutionary psychology is how the human mind anticipates the future and copes with stress and risk of disease. The parasite-stress model suggests that many patterns of human behavior and thought are adaptations to varying levels of exposure to parasites and pathogens. A growing body of health psychology research shows a link between positive future thinking and resiliency to various forms of disease. In this study, we investigate the link between