Language—the foundation of our social interactions, of our cultures, of our political organizations, and perhaps of what it means to be human—is another product, and driver, of our intelligence. Every principle and abstract concept, every small creative endeavor or project, every encounter in your life, has been mediated by our species’ unique and endlessly complex capacity for imagination, creativity, and reason. Human ingenuity is an astonishing thing. Only one other force is so omnipresent in this picture: biological life itself. Before the modern age, aside from a few rocks and minerals,
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