Dr. Randy Thornhill is an evolutionary biologist and a Distinguished Professor of Biology Emeritus at the University of New Mexico. He is a pioneering researcher of parasite-stress theory, which describes how pathogens have throughout history shaped our behavior and values. 

In this episode we discuss parasite-stress theory and the behavioral immune system, and how conservative values are cross-culturally associated with regional parasite prevalence. Additionally, we discuss these findings in the context of the ongoing COVID-19 pandemic, and how advancements in sanitation throughout history may have given rise to more liberal ideals.