So why do we do it? Because our brains used to spend time and metabolism to check in on others in our social tribe because that was extremely useful information at one point and because there was a limit to how much information could be gleaned in an afternoon in the African savannah. Pre language, it was just eye contact and body language and who is fighting whom, and who is fucking whom, and who is throwing dirt in each other’s eyes. That was it. That’s what social media was back in our primate days: just looking where other people are looking.