The author argues that something has gone wrong with adolescents and screen activities, particularly social media. They propose four norms to correct this:1. No social media before age 16.2. Phone-free schools where students put their devices away at the start of the day.3. More independence, free play, and responsibility in real-world experiences.4. Parents trusting their children with more responsibility and independence.The author also suggests that Congress should raise the age of "internet adulthood" to 16 and require tech companies to keep underage children off their sites. They emphasize the need for collective action from parents, schools, and communities to change norms and create a healthier childhood.