Young people have become powerless against the multibillion-dollar tech companies whose apps exploit adolescents' need for social acceptance. This is the backdrop against which my book, "The Anxious Generation," was published in 2024. The book helped fuel the movement to reclaim childhood from tech companies a movement that has since spread, driven in part by the protective passions of parents. Already, a majority of states have enacted laws to limit phone use in school. Eighteen states and Washington, D.C., have gone all the way and enacted "bell-to-bell" phone restriction policies, which liberate students from the distraction of their phones for the entire school day. Outside of the United States, Brazil has made every school phone-free, and new school phone policies have passed in the Netherlands, Finland and South Korea, among other countries. We are just beginning to see some of the impacts: Children are more attentive in class and are reading more books; teachers have told me they hear more laughter in the halls and at lunch. Heavy social media use doubles the risk of depression for adolescents. Just as we have age limits in the real world for porn, gambling, alcohol, tobacco and many other products, countries have begun enacting policies to add age restrictions to social media. These things may seem small, but in terms of children's development ... they're enormous.