It’s not just bad vibes — America’s kids are not OK. As study after study shows worsening youth mental health, a popular theory has emerged: The rise of smartphones and the addictive nature of social media is making young people miserable. But can it really be that simple?This week, the hosts debate the myriad possible factors contributing to teenagers’ unhappiness, and discuss how parents, schools and the government can protect kids without doing further harm. Plus, a sui generis Lozada family vacation.(A full transcript of this audio essay will be available within 24 hours of publication on the Times website.)Recommended in this episode:“The Anxious Generation,” by Jonathan Haidt“Reclaiming Conversation,” by Sherry Turkle“A Canticle for Leibowitz,” by Walter M. Miller Jr.Thoughts about the show? Email us at matterofopinion@nytimes.com or leave a voicemail at (212) 556-7440.