Wealth and comfort are unparalleled, but our political landscape is unmoored, and rates of suicide, loneliness, and chronic illness continue to skyrocket. For evolutionary biologists Heather Heying and Bret Weinstein, the cause of our troubles is clear: the accelerating rate of change in the modern world has outstripped the capacity of our brains and bodies to adapt. In this book, Heying and Weinstein draw on decades of their work teaching in college classrooms and exploring Earth’s most biodiverse ecosystems to confront today’s pressing social ills—from widespread sleep deprivation and dangerous diets to damaging parenting styles and backward education practices. Asking the questions many modern people are afraid to ask, A Hunter-Gatherer’s Guide to the 21st Century outlines a science-based worldview that will empower you to live a better, wiser life.