How does Darwinian medicine use evolutionary biology to study human disease?

Darwinian medicine is not a specialized research method but a foundational science that applies the principles of evolutionary biology to understand, prevent, and treat human disease. It distinguishes itself from the outdated concept of "medical Darwinism" by using evolutionary frameworks to explain why the human body remains vulnerable to illness despite natural selection.1

Researchers in this field study disease through several key evolutionary lenses:

• Vulnerability Analysis: Scientists investigate why natural selection has left the body susceptible to disease, categorizing these reasons into factors such as environmental mismatches (e.g., obesity and hypertension), evolutionary constraints, and trade-offs where traits are optimized for reproduction rather than longevity.1
• Pathogen Evolution: By modeling the natural selection of infectious organisms, the field addresses antibiotic resistance and the virulence of diseases.1
• Protective Responses: Many symptoms, such as fever, pain, and anxiety, are viewed as adaptive defenses rather than diseases themselves, often functioning via the "smoke-detector principle" where false alarms are a small cost for survival.1

Ultimately, this approach provides a more comprehensive biological view of health, moving beyond the metaphor of the body as a perfectly designed machine.1