All societies – and the states that serve them – have a responsibility to protect their children from harmful addictions. And addiction is exactly what social-media companies are trying to cultivate. As Facebook’s founding president, Sean Parker, revealed in 2017, the process of building the platform was guided by a simple question: “How do we consume as much of [users’] time and conscious attention as possible?” The answer these firms reached lay in “exploiting a vulnerability in human psychology”: the desire for social validation.