If you look back over human history, only a few energy sources fundamentally changed everything for most everyone—fire, electricity, and computing. And now, given where computing has arrived with the cloud, it is not an exaggeration to suggest that it’s becoming more profound than fire and electricity. Fire and electricity were hugely important sources of mass energy. They could warm your home, power your tools, or transport you from place to place. But in and of themselves they couldn’t help you think or think for you. They could not connect you to all the world’s knowledge or all the world’s
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