Besides global health, I’m really interested in biological anthropology, which is basically the study of humans, how we evolved, and how our bodies adapted over time. At first these two interests felt unrelated, but they actually connect in a cool way through something called evolutionary medicine.

The basic idea is “evolutionary mismatch.” A paper in the journal Evolution, Medicine, and Public Health explains that humans evolved in environments very different from the ones we live in now, and a lot of modern chronic diseases come from that mismatch between our ancient biology and our modern lives.

A good example is obesity. Our ancestors lived in a world where food wasn’t always available, so our bodies got really good at storing fat and craving high-calorie food, because that helped them survive. Those were useful traits back then. But now, when high-calorie food is everywhere and we sit a lot more, those same traits work against us. Our bodies are basically running ancient software in a world it wasn’t designed for.

I think this is fascinating because it means a lot of today’s diseases aren’t random. They have roots that go back thousands of years in how humans adapted to their environments. Studying fossils, genetics, and how different populations adapted to different climates and diets can actually help explain why certain health problems show up the way they do.

It also ties back to prevention, which is where my head always goes. If a lot of chronic disease comes from a mismatch between our biology and our environment, then changing the environment, like our diet, activity, and surroundings, is a real way to prevent disease. We can’t change our evolution, but we can change the conditions we live in.

So old bones and modern public health aren’t as far apart as they seem. Understanding where we came from helps us understand why we get sick, and maybe how to stop it.

Interesting Article I read: Evolutionary mismatch — Evolution, Medicine, and Public Health (Oxford)