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Cal Newport on the Ezra Klein Show:

“Digital interaction” actually doesn’t come close to giving the same rewards as… real world conversation. So this is why you can actually get more lonely as you spend more time doing digital interaction. It’s not because the digital interaction itself is causing this negative effect; it’s because it’s crowding out the real world conversation which is what our brain is evolved to actually crave. Our brain doesn’t understand that that number or that little comment under a picture on a small glowing rectangle in your hand is another human being who’s interacting with you and fulfilling your need for sociality. There is some part of your frontal cortex that thinks that counts, and so you do more and more of that and less and less of the real world, and it leaves you worse off…[Digital interaction] is not a substitute. It’s a sort of arbitrary activity that was cooked up by 20-somethings in some incubator rec room in Northern California.