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'An engrossing, richly informative exploration of human biological diversity . . . it challenges us to rethink universal health benchmarks' New Yorker

Real diversity isn?t skin deep. Over the past 100,000 years, as humans expanded into every biome on the planet, our bodies and our cultures have been fine-tuned to our local environments. Beyond the physical demands of our climate, we live our lives immersed in ideas and norms that affect what we eat, how we move and why we get sick ? all of which, in turn, affect how our bodies work.

As an evolutionary anthropologist conducting ground-breaking research with human populations around the globe, Herman Pontzer has come to see much more clearly how our genes and environments combine to shape our bodies and our health: for better or worse. In this book, he takes us on a tour of the human body and the surprising ways it can change in response to its environment: from the Andean groups who have developed increased lung capacity to the Sama divers who have larger spleens. He also highlights the critical ways we misinterpret biological adaptations: in healthcare, public policy and individual choices.

With so much of our wellbeing and public discourse centred on human biology, a clear understanding of the distinction between socially constructed and genetic differences is more important than ever. This timely reappraisal of an overlooked science is an essential guide to our remarkable bodies.