Hardwired: How Our Instincts to Be Healthy are Making Us Sick

Why can greater medical knowledge coexist with habits and environments that make well-being harder to maintain? In Hardwired: How Our Instincts to Be Healthy are Making Us Sick, Robert S. Barrett and Louis Hugo Francescutti explore the tension between ancient survival drives and the pressures of modern life. Their central idea is that instincts once useful for survival can sometimes work against health in a world of constant stimulation, abundant food and intense social demands.

Health through an evolutionary and social lens

Drawing on medicine and social science, the authors look beyond health information alone to consider how behavior, relationships and surroundings influence well-being. Research and real-life stories help frame their discussion of why people may be drawn to immediate rewards even when those choices carry costs.

Seven chapters, from cravings to risk

The book moves through seven themes: hospital safety; cravings and stress; childhood, war and social media; happiness; sleep; risk-taking; and historical lessons about supporting health. Together, these subjects connect everyday experiences with broader questions about how people respond to their social and physical environments.

What the book asks readers to reconsider

• Reward and behavior: How drives for food, stimulation and social approval can shape decisions.
• Modern pressures: How technology, social life and contemporary routines intersect with well-being.
• Health beyond the clinic: Why understanding behavior and social context matters alongside medical knowledge.
• Awareness of instinct: How recognizing automatic responses can offer a different perspective on everyday choices.

For readers curious about health and human behavior

Hardwired will interest readers exploring public health, evolutionary explanations of behavior and the social dimensions of wellness. Its mix of research, examples and broad questions makes it a conversation-starting read for anyone curious about why modern life can challenge the instincts that helped humans survive.

This book presents the authors’ perspective on health and behavior; it is not a substitute for individualized medical advice.