Show Notes
Fire didn't just change dinner. It changed us. If I asked you what made us human, you might say language. Or tools. Maybe agriculture. All of those changed our species, but I think one discovery came even earlier—and it may have been the most important of all. Fire. Not because it kept us warm. Not because it frightened predators. But because it cooked dinner. At first glance, that might seem like an odd claim. After all, cooking is something we do every day without much thought. However, when you look at the science and the history together, cooking becomes one of the most remarkable innovations in human evolution. More importantly, it changed far more than the taste of our food. For more in-depth discussion, go to my Substack channel at DrSimpson.com
Cooking Changed the Food We Ate Before humans learned to control fire, food was difficult work. Raw meat is tough. Many roots are fibrous. Grains are nearly impossible to eat without processing, and many plants lock away their nutrients behind tough cell walls. Then everything changed. Cooking unfolds proteins, softens connective tissue, gelatinizes starches, and breaks down plant cell walls. As a result, our digestive system has less work to do, and we gain access to more of the calories and nutrients already present in the food. In other words, cooking didn't create nutrition. It unlocked it.
Then Cooking Made Food Safer However, the story doesn't stop with nutrition. Long before anyone understood bacteria or parasites, early humans discovered something through observation. Food cooked over a fire made people sick less often. Today we know why. Heat destroys many harmful bacteria. It kills many parasites. It reduces the risk of foodborne illness. Consequently, cooking likely became one of humanity's earliest public health tools. Groups that regularly cooked their food would have lost fewer children to severe diarrheal disease, had healthier adults, and retained more of the calories they worked so hard to obtain. That is a tremendous evolutionary advantage.
Flavor Matters More Than You Think There is another benefit that often gets overlooked. Cooking made food taste better. That may sound obvious, yet it is incredibly important. Humans don't simply eat because food contains nutrients. We eat because food is enjoyable. Cooking creates hundreds of new flavor compounds through browning reactions that simply don't occur in raw food. Think about the smell of fresh bread. Or grilled steak. Or roasted coffee. Those aromas are products of cooking. Likewise, a cooked potato bears little resemblance to a raw one. The texture changes. The flavor changes. Even the way our bodies digest the starch changes. Fire didn't just feed us. It invited us back for another meal.
The Real Lesson from Evolution Unfortunately, some people oversimplify this fascinating story. They argue that because meat was important during human evolution, the ideal modern diet must consist almost entirely of meat. The science doesn't support that conclusion. Cooking improved meat. It also improved roots. Cooking made tubers tasty. Then cooking softened grains. And finally, it made legumes digestible The evolutionary advantage wasn't eating one perfect food. Instead, it was becoming adaptable enough to thrive on many foods by transforming them with fire. That is a much more interesting story—and one much better supported by the evidence.
Why This Still Matters Today Even in modern kitchens, we continue using the same principles our ancestors discovered thousands of years ago. We cook food to improve digestibility. And we cook food to improve safety. We cook food because it tastes better. Most importantly, we gather around meals because cooking has always been about more than calories. It has always been about family, community, and sharing stories. Perhaps civilization didn't begin with the first city. Perhaps it began around the first campfire.
More from Fork U with Dr. Terry Simpson
With all the spices we have access to, it is amazing how bland recipes have become. I have many cookbooks, some from great chefs, television personalities, and friends. What I am always surprised by is how bland the food has become. People seem to think a bit of salt, pepper, maybe onions, and garlic provide the spices one needs. Perhaps it is because some associate spice with heat. Mostly because many have never experimented with some of those great warm spices available. A pinch of coriander, some freshly ground cumin, a little cardamom, or a touch of cinnamon can turn an ordinary dish into something remarkable. And the most astonishing part is that these spices financed voyages around the world, built cities, created fortunes, and caused people to kill one another. Without the spice trade, it is safe to say that the United States, as we know it, would be vastly different from what it is now. The money loaned to the United States, when we were a fledgling country, came from the wealthy spice merchants from what was considered one of the great hyperempires of the world, based in Amsterdam. But before we go to the birth of the United States, let me take you to the meatball.
Tea: The Drink That Built an Empire—and Helped Break One China had the tea. Britain had the appetite. John Hancock had a business to protect.
MesoAmerica and Chocolate In our series looking at foods that built civilizations, today we are going to stay in the Americas with chocolate. Chocolate has been used as currency, consumed by kings, incorporated into religious ceremonies, and prescribed as medicine. Today, it is a multibillion-dollar industry that wants you to believe that eating chocolate is an act of preventive cardiology. I mean, why not? They convinced us to give chocolate to people we love, eat it when we are happy, when we are sad, when only the dog understands us. Don’t feed chocolate to your dog. And we have done all this with a bitter seed that most of us would probably spit out if we tasted it straight from the tree.
I’ve been doing a series about foods that built civilizations. In this episode, we are talking about the potato. It is difficult to imagine that thousands of years ago, people constructed large buildings, managed rivers, built monuments, and created art. We have glimpses of these civilizations through stories, archaeology, and the structures they left behind, but much of their history has been lost. Imagine, we don’t even know where Cleopatra or Alexander the Great are buried, yet we know their stories. As European powers conquered Indigenous peoples, their languages, cultures, and oral traditions were suppressed. When a language disappears, so are the stories preserved within it. Our clues come from archaeology when we uncover a monument, a building, or an ancient settlement. In the Andes, the potatoes they cultivated were not the Russets, Yukon Golds, or fingerlings you find in the store today. Different colors, shapes, and textures. Adapted to survive the elevations, temperatures, and growing conditions. Biodiversity protected their food supply against frost, disease, and changing environmental conditions. If one variety failed, another might survive. The ancient wisdom of diversity that Andean farmers developed over thousands of years was lost when the potato eventually reached Ireland.
In our series about foods that built civilization, we talked a lot about grains, from wheat to corn to rice. Today, we are taking you to the ocean, with the civilizations that salmon built. From California to the interior of Alaska, salmon, a staple, allowed people to settle into villages, develop complex social networks, art, and trade routes. Those trade routes are as large as the ones in the Mediterranean. Some tribes built communal homes and developed complex art and language. Some were Seafaring tribes with canoes up to 60 feet long that traveled across oceans. All because there was a fish that would return in large numbers to streams and rivers, reliably, predictably. So predictable, the people could build their lives around salmon runs. So much so that some built a calendar not only with lunar cycles, but also with the return of the salmon. Civilizations have always gathered around food and water. The Mediterranean connected people who grew wheat and olives, giving people time to make wine, mine copper, build ships, trade with their neighbors, and occasionally go to war with them. Asia had rice and grain near the great river systems. The reliable calories from rice and grains allowed villages to become cities and to travel by water to trade. Today we are going to my home, from the Ventura River in California to my home state of Alaska.