There is a moment that almost everyone who has ever tried to change a deeply ingrained behaviour recognises. You have made the decision. You are motivated. You have the information. You know what needs to change and you are genuinely committed to changing it. And then you walk into a particular room, see a particular person, encounter a particular smell or sound or social ritual, and the old behaviour returns before you have consciously decided anything at all.

This is not a failure of willpower. It is not a failure of character or commitment or desire. It is the entirely predictable consequence of attempting to change a behaviour while remaining inside the environment in which that behaviour was learned, reinforced, and rewarded over years or decades.

The environment does not merely trigger behaviour. In a very real neurological sense, the environment is the behaviour. The cues, the people, the routines, the emotional associations, the social rituals, the physical spaces — all of these are not simply reminders of the behaviour pattern. They are constituent elements of it.

This blog draws on the work of Dr. Jason Fung across The Obesity Code, The Hunger Code, and The Cancer Code, alongside the research of Dr. Robert Lustig, Dr. Gabor Maté, Dr. Bessel van der Kolk, and the broader field of environmental psychology and behavioural medicine.

How Environments Create Behaviour: The Neuroscience

The brain learns through association. Every time a behaviour occurs in a specific environment — eating in front of the television, drinking at a particular social gathering, reaching for sugar when stressed in the family kitchen — the neural pathway connecting that environment to that behaviour is strengthened. This is Hebbian learning: neurons that fire together wire together.

Dr. Jason Fung — The Obesity Code: Obesity is not a personal failure. It is the entirely predictable biological outcome of specific hormonal and environmental conditions. When we change those conditions, we change the outcome.

Fung’s framework removes the moral dimension from behaviour that is environmentally and biologically driven. The person who overeats in a specific environment is not lacking discipline. They are responding to an environment that has been conditioning them — hormonally, neurologically, socially — to respond in exactly that way.

People, Places, and Things: The Three Pillars of Behavioural Environment

People: The Social Architecture of What We Eat and Drink

Human beings are profoundly social creatures whose behaviour is shaped to a degree that most people significantly underestimate by the behaviours of those around them.

Christakis & Fowler — Connected: Obesity spreads through social networks with a statistical pattern similar to infectious disease. Having an obese close friend increases a person’s own risk of obesity by 57%.

The food we eat is profoundly socially determined. What is served at family gatherings. What is ordered when eating with colleagues. What is considered normal, celebratory, comforting, or hospitable within a specific social group. These social food norms are not peripheral to eating behaviour — they are central to it.

Dr. Gabor Maté — In the Realm of Hungry Ghosts: The question is never ‘why the addiction?’ but ‘why the pain?’ And the pain is almost always about disconnection — from others, from self, from meaning.

Places: How Physical Spaces Encode Behaviour

Physical environments encode behaviour with a specificity that is sometimes startling. The kitchen at 10pm. The break room at work. The petrol station on the commute home. These spaces carry powerful conditioned associations — built through hundreds or thousands of repetitions of a behaviour in that location.

Brian Wansink — Mindless Eating: People eat 92% of what they serve themselves regardless of hunger. The environment — plate size, lighting, serving distance, food visibility — determines consumption far more powerfully than hunger or intention.

Things: Objects, Rituals, and Material Triggers

Objects carry extraordinary behavioural weight. The television remote that always accompanies late-night eating. The wine glass that signals the end of the working day. The particular brand of biscuit that was always in the tin at a grandparent’s house. These objects are neurologically loaded triggers built through years of consistent association.

Dr. Robert Lustig — Metabolical: Ultra-processed food is not food. It is a drug delivery system. It has been engineered to be as addictive as possible and as nutritionally bankrupt as possible simultaneously. The environment it creates is one of perpetual chemical stimulation and metabolic dysfunction.

The Original Environment: Where the Behaviour Was Learned

Almost every maladaptive eating, drinking, or consumption behaviour has an origin in a specific environment and a specific emotional or social function. The child who grew up in a household where food was love — where care was expressed through cooking, where abundance at the table meant safety — learned at a level beneath conscious awareness that food and love are the same thing.

Dr. Bessel van der Kolk — The Body Keeps the Score: Traumatic experiences are stored not as memories but as physical sensations and automatic responses. The body responds to present environments as if past threats were still active — and the behaviours that were once adaptive responses become persistent patterns that operate below conscious control.

The Hardest Environment to Change: Your Own Family

Of all the environmental challenges involved in changing maladaptive behaviour, none is more complex than the challenge of changing within a family system whose norms, rituals, and relational dynamics are built around the behaviour you are trying to leave behind.

The family is not merely an environment in which behaviour occurs. It is the original school of behaviour — the primary context in which every fundamental pattern of eating, drinking, relating, managing emotions, and navigating stress was first learned.

Food as Family Identity

In many families, food is not merely fuel or even comfort. It is identity. Family recipes, food traditions, the meals that define celebrations — these food associations are woven into the fabric of family belonging. The person who declines the pasta at a family gathering is not simply making a dietary choice. They are visibly differentiating themselves from the group norm.

Changing Generational Behaviour

Many of the maladaptive eating, drinking, and lifestyle behaviours that individuals are trying to change are not personally invented. They are inherited patterns — transmitted across generations.

Dr. Gabor Maté — The Myth of Normal: What we call individual pathology is very often the predictable expression of a family system’s adaptations to stress, trauma, and environment across generations. Healing the individual requires understanding the system that shaped them.

Research in epigenetics has documented that the stress responses, appetite regulation patterns, and metabolic tendencies of parents and grandparents can be transmitted to their children and grandchildren through epigenetic modifications.

What Genuine Environmental Change Requires

Design the Environment Before Testing the Willpower

The single most evidence-supported finding in behavioural change research is that environmental design produces more durable behaviour change than willpower-based approaches — with a fraction of the cognitive cost.

BJ Fogg — Tiny Habits: Behaviour happens when motivation, ability, and a prompt converge. The most reliable behaviour change does not come from increasing motivation. It comes from reducing friction for the desired behaviour and increasing friction for the unwanted one.

Understand the Social Environment With Honesty

Some of the most important questions to sit with: What does food mean in my family beyond nutrition? What happens socially and relationally when I change my eating? Whose behaviour am I implicitly commenting on when I change my own? What am I genuinely afraid of losing? What support do I need and have I asked for it directly?

Address the Original Need

Every maladaptive behaviour that persists does so because it is meeting a need. The intervention that addresses the need is more durable than the intervention that merely removes the behaviour. The person who eats for comfort needs genuine comfort available from non-food sources. The person who drinks for social belonging needs genuine belonging available without alcohol.

Change One Generation and You Change All That Follow

Every parent who changes their relationship with food changes the food environment their children grow up in. Every person who disrupts a generational pattern of maladaptive coping creates a different neural template for the next generation.

“You did not create the environment that shaped you. But you are the first person in your line who knows enough to change it. That knowledge is not a burden. It is a responsibility. And it is also a gift — to every person who comes after you.”

Key References: Dr. Jason Fung — The Obesity Code (2016), The Hunger Code (2023), The Cancer Code (2020). Dr. Robert Lustig — Metabolical (2021). Dr. Gabor Maté — In the Realm of Hungry Ghosts (2008), The Myth of Normal (2022). Dr. Bessel van der Kolk — The Body Keeps the Score (2014). Christakis & Fowler — Connected (2009). BJ Fogg — Tiny Habits (2019). Brian Wansink — Mindless Eating (2006).