Our ancestors, whose strong jaws constrained skull growth, spent their time relentlessly chewing and digesting food like primates today. Liberated from this mundane necessity by fire, they could spend more time doing interesting things like hunting energy-rich foods, fashioning tools, or building complex social networks. The campfire became a central hub of human life, helping establish communities and relationships and organizing labor. The evolution of Homo sapiens rode these waves. We are not just the creators of our tools. We are, down to the biological, the anatomical level, a product of
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