Tristan Harris, 33
Put down your phone. Go outside. Do something else. This is the gospel that Harris, a modern-day Neil Postman, preaches. Formerly Google’s resident “design ethicist,” he left after becoming disillusioned with the ways tech companies prey on people’s time and attention. Then he single-handedly kicked off an international conversation about digital distraction and app addiction with his viral writings and talks. In January, Mark Zuckerberg co-opted Harris’s signature phrase, “Time well spent,” as a design goal for Facebook.
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