Human biology didn’t evolve in isolation. It evolved in constant dialogue with the environment… light and darkness, movement and rest, periods of abundance and scarcity. But in just a few generations, that environment has shifted dramatically. Artificial light extends the day indefinitely. Food is available around the clock. Screens, stress and cognitive demands follow us everywhere. And while technology has advanced rapidly, our underlying biology hasn’t changed at the same pace.

To explore what this mismatch means for modern wellbeing, we spoke with Shawn Stevenson, health educator, author and podcast host specialising in human performance, sleep biology and environmental physiology and a member of our BON CHARGE Scientific Advisory Board. What follows is a systems-level look at how modern environments interact with ancient biology and why so many people feel like they’re doing everything right yet still struggling.

When The Environment Outpaces Evolution

“When we zoom out, it becomes clear that a large part of modern health challenges comes down to the speed of environmental change,” explains Shawn. “Evolution happens, but it happens slowly. Human biology evolved in sync with a 24-hour solar day, seasonal rhythms and natural cycles of light, food and rest.”

For most of human history, light exposure followed a predictable pattern; darkness signalled rest. “In just the last few decades, we’ve created an environment with constant access to artificial light, food and stimulation,” says Shawn. “These inputs fundamentally change how our biology receives information, especially at the level of circadian timing.” Rather than being a failure of willpower or discipline, many modern health struggles reflect a deeper biological mismatch between the environments we evolved for and the environments we now live in.

The Environmental Signals Biology Depends On

Human biology is regulated by interconnected systems that respond continuously to environmental cues. Among the most influential of these is the circadian timing system AKA the body’s internal network of biological clocks.

“These clocks aren’t abstract concepts,” Shawn explains. “They’re functional genes and proteins that help regulate the timing of nearly every physiological process - from hormone release and digestion to sleep, energy and behaviour.” While many factors influence these systems, Shawn consistently points to light exposure as one of the most powerful. “Light is the primary controller of our circadian timing system,” he says. “When light signals are inconsistent (bright at night, and dim during the day), the body loses clarity around what it should be doing and when.”

Food timing, sleep patterns and daily movement all interact with these signals. When they fall out of rhythm, this misalignment may influence energy levels, metabolic regulation, mood and long-term resilience.

Is This Really A Personal Failure, Or A Design Problem?

Sleep issues, low energy and chronic stress are often framed as a lack of personal discipline, but Shawn believes that perspective misses the bigger picture. “Our culture shapes what feels normal, automatic and even possible,” he says. “The shared environments we live in influence our choices long before conscious decision-making comes into play.”

From what we eat, to how we move, to how late we stay exposed to screens, modern environments quietly define behavioural defaults. Many people never realise there are alternatives because the environment they grew up in made certain patterns feel inevitable.

“The key is recognising that while we are products of our environment, we’re also capable of reshaping it - especially at the level of our own homes and routines,” says Shawn. By intentionally adjusting environmental inputs, healthier choices can become easier, more natural and more sustainable.

What Happens When Light Loses Its Rhythm

For most of human history, light arrived with the sun and disappeared with darkness. That predictability shaped our sleep-wake cycles, hormonal timing and the body’s natural maintenance processes. “When that pattern is broken consistently, the body receives conflicting signals,” adds Shawn.

He points to growing research exploring how frequent exposure to artificial light (particularly at night), may be associated with changes in circadian regulation and long-term biological stress.

“This isn’t about fear,” he says. “It’s about understanding that light is information. When the information becomes confusing, biological systems struggle to stay aligned.” From sleep quality to energy regulation, disrupted light rhythms may influence multiple systems, especially when combined with stress, sedentary habits and irregular eating patterns.

Why ‘Doing Everything Right’ Still Isn’t Enough

One of the most common patterns Shawn sees is people who appear to be doing everything correctly (like eating well and exercising regularly) yet still feel unwell. “Often, what’s missing isn’t effort, it's recovery, rhythm and stress awareness,” he says.

“Sleep quality and stress regulation change how the body responds to nutrition and movement,” Shawn explains. “Without addressing those foundations, results can feel inconsistent or stuck.”

Rather than adding more strategies, he encourages people to look at the environmental signals that quietly influence how the body responds day to day.

Understanding The Power Of Environment

If there’s one thing Shawn wishes people understood more deeply, it’s that our environment shapes our biology continuously and often without us realising it. “Once we see how much our surroundings influence our choices and physiology, we can begin to redesign our environment intentionally,” he says. “We can make supportive behaviours more automatic, rather than something we constantly have to fight for.” That mindset shifts health away from optimisation and more towards alignment by restoring inputs the body has always depended on.

The BON CHARGE Perspective

At BON CHARGE, an understanding of how environment and biology work together shapes how light-based and bio-responsive technologies are created and used. Rather than replacing healthy habits, these tools are designed to support key biological signals that are often disrupted by modern life, including daily rhythm, recovery and circadian cues.

Shawn’s role within BON CHARGE is to help place these technologies within a wider context of education and lifestyle. This helps ensure they’re seen as supportive tools, not shortcuts or standalone solutions. Because when health is viewed as a whole system, meaningful change starts with the environment, not just individual behaviour.

BON CHARGE: This content is for general education only and is not medical advice. Our products are not intended to diagnose, treat, cure or prevent any disease. Always consult a qualified healthcare professional for guidance tailored to you. Individual responses may vary.