I wonder if a large part of what makes social media unhealthy is exposing human nature to mass communication.

I hate Facebook and Twitter as much as the next person, but maybe humans haven't evolved to be able to instantly reach an audience of thousands or millions without any personal or social risk. People have been dangerous and inhuman for many years in the past on a grand scale, but now every human can exist on a grand scale, and maybe the results of that alone are often unsavory.