The cellular telephone was an incredibly dangerous invention, in terms of the mental health of the population, but smartphones and social media are far, far more pernicious. From what I've been witnessing, they mark the absolute and complete destruction of a functional society. Most people these days have turned into zombified, phone-addicted, "like" and "follower"-addicted shadows of real people. For those of us who remember what the world was like before all this shit, it's incredibly sad.