We already use social networks like a life-long rolodex, the obsessive of us 'curate' our feed by specifying who is a close friend, who we keep an eye on and who we unfollow. Soon, the proper dosage of friends will get served up to us in easy-to-consume social networks and digital messaging. Who we encounter may not be so random.
Why now? What has shifted in the adjacent possible to imagine this now? Growth of machine learning and neural networks, ubiquity of social media, plus the number of recent studies showing health impact of friends. Plus, it builds on what people intuitively do now.
A blast of studies using social media and real-live tracking show if you have a friend who becomes obese, you have 57% chance of tipping the BMI meter into obesity. Students with studious room-mates study more, diners sitting next to big eaters at the lunch counter eat more. Friends of friends have a surprising effect, even if you don’t personally know them, if you want to stop smoking, lose weight or survive illness WHO you know has a massive effect.
Friends, plus friends of friends. Think about the people who influence you?
Turns out the number of friends you have is actually governed by the size of your neocortex, the Dunbar number, named after the anthropologist who studied primates in the 1980’s. You basically have 150 friends. While you might have 500 acquaintances, 15 close friends and a handful of intimate friends, the 150 number is common across all cultures.