The brain is well adapted to sensing and moving the body, to navigating through physical space, and to interacting with other members of our species. On top of this basic suite of human competencies, civilization has built a vast edifice of abstraction, engaging our brains in acts of symbolic processing and conceptual cognition that don’t come as naturally. These abstractions have, of course, allowed us to expand our powers exponentially—but now, paradoxically, further progress may depend on running this process in reverse. In order to succeed at the increasingly complex thinking modern life
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