We need to sort of give you a little dopamine hit every once in a while, because someone liked or commented on a photo or a post or whatever.… It’s a social-validation feedback loop … exactly the kind of thing that a hacker like myself would come up with, because you’re exploiting a vulnerability in human psychology.… The inventors, creators—it’s me, it’s Mark [Zuckerberg], it’s Kevin Systrom on Instagram, it’s all of these people—understood this consciously. And we did it anyway … it literally changes your relationship with society, with each other.… It probably interferes with productivity
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