Humans Are Built for Nature Not Modern Life

A new analysis by evolutionary anthropologists Colin Shaw (University of Zurich) and Daniel Longman (Loughborough University) argues that the modern world has developed faster than human biology can adapt. Their work proposes that chronic stress and many widespread health concerns stem from a fundamental mismatch between our nature-shaped physiology and the highly industrialized environments most people live in today.

For hundreds of thousands of years, humans evolved to meet the physical and psychological demands of hunter-gatherer life, which required frequent movement, short bursts of intense stress and daily exposure to natural settings. Industrialization has altered these conditions within only a few centuries by adding noise, air and light pollution, microplastics, pesticides, continuous sensory input, artificial lighting, processed foods and long periods of sitting.

“In our ancestral environments, we were well adapted to deal with acute stress to evade or confront predators,” says Colin Shaw, who leads the Human Evolutionary EcoPhysiology (HEEP) research group with Daniel Longman. “The lion would come around occasionally, and you had to be ready to defend yourself — or run. The key is that the lion goes away again.”

Modern stressors such as traffic, workplace pressure, social media and persistent noise activate the same biological pathways that once helped humans survive predators. Unlike the rapid resolution our ancestors experienced, these stressors rarely subside. “Our body reacts as though all these stressors were lions,” Longman explains. “Whether it’s a difficult discussion with your boss or traffic noise, your stress response system is still the same as if you were facing lion after lion. As a result, you have a very powerful response from your nervous system, but no recovery.”