For more than three million years, food shaped our evolution, our brains and our biology.

From the foods we could find, gather, hunt and eventually cook, our ancestors developed the bodies, the brains and the behaviours that define Homo sapiens.

This chapter explores how the evolutionary journey of food and humanity are inseparable—and why the ancient mechanisms that helped us survive still influence the way we eat today.

Around ten thousand years ago, humanity made a choice that changed everything. We began to cultivate plants and domesticate animals.

This shift from foraging to farming transformed not only what we ate, but how we lived.

Surpluses allowed settlements to grow. Ownership of land emerged. Trade, specialisation, social hierarchies, religions and civilisations all followed.

Food was no longer just sustenance—it became the foundation of society, culture and power.

When explorers crossed oceans, they carried more than maps and curiosity—they carried seeds, spices and the future of our food.

The Columbian Exchange introduced new ingredients to new lands, reshaping diets, economies and cultures across the globe.

Tomatoes, potatoes, maize, chocolate and chillies—once unknown—became essentials. Sugar, wheat and rice travelled in the other direction.

Our plates today are the delicious result of this extraordinary exchange.

From the 1700s onwards, a series of innovations transformed agriculture. New tools, better breeds, fertilisers and mechanisation vastly increased productivity.

We drained swamps, ploughed prairies and expanded fields to the horizon. Animal agriculture scaled. Yields soared. Food became more abundant—and more affordable.

These advances helped feed billions and lifted many out of hunger. But they also set the course for a food system increasingly shaped by scale, specialisation and efficiency.

In the 20th century, science, engineering and business joined forces to create an entirely new way of producing, processing, packaging and distributing food.

Factories replaced kitchens. Brands were born. Efficiency became the engine. Global companies emerged. Supermarkets transformed the shopping experience.

Food became faster, cheaper, more consistent and more available than ever before—delivered to billions of people, every day.

It was one of the greatest system engineering achievements in human history.

In the 20th century, science helped us understand calories, fat, sugar and nutrients. But our solutions often created new challenges.

We chased low fat, only to add more sugar. We removed natural foods, replacing them with ultra-processed alternatives. Convenience soared. So did chronic disease.

Our bodies evolved for scarcity. Our environment evolved for balance. But our food system evolved for profit, convenience and speed.

The result: a mismatch between the food we eat and the biology we live in.

Our biology was shaped by scarcity, seasonality and the need to survive. Our brains reward energy-dense foods because, once, they were rare and precious.

Today, those same ancient systems operate in a world of abundance, convenience and constant availability. The result: cravings, overconsumption and chronic disease.

Science is revealing more about our DNA, our microbiome, our hormones and our reward pathways. But understanding is not the same as changing.

To build a healthier future, we must align what our bodies were designed for with the world we have created.

Our modern food system feeds billions and generates trillions. It creates jobs, drives innovation and underpins economies.

But the costs are often hidden. Poor diets burden health systems. Environmental damage threatens our planet. Inequality and waste undermine fairness and resilience.

We need a new way to see the big picture—one that connects people, planet and prosperity.

To build a better future, we must measure what matters, reveal the hidden costs and redesign for long-term value.

We have the knowledge, technology and creativity to build a food system that nourishes people and regenerates our planet.

Innovation is accelerating. New ideas are emerging from labs, farms, kitchens and communities around the world.

But the future will not be built by one sector alone. It will take collaboration across science, industry, government and society.

Our choices today write the next chapter of our food story. Let’s write one we can be proud of—for our children, and for generations yet to come.