The first wave was the Neolithic revolution, which most anthropologists agree began around twelve thousand years ago. That was when hunter-gatherers transitioned to agricultural societies that settled in one place and grew their own food. We usually identify this moment as the beginning of civilization. The basic structure of human life—rooted in agriculture as the central human activity, and the sun and human labor as the main sources of energy—endures until the eighteenth century. That is when the second wave, the industrial revolution, begins. This step change in human development comes
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