I was chief researcher and in-house editor for The Coddling of the American Mind by Greg Lukianoff and Jonathan Haidt. In the book, we outline three misguided principles (“Great Untruths”) that form the foundation of the new moral culture we are seeing on some college campuses: The Untruth of Fragility: What doesn’t kill you makes you weaker. The Untruth of Emotional Reasoning: Always trust your feelings.  The Untruth of Us Versus Them: Life is a battle between good people and evil people. We also trace six explanatory threads—cultural trends and practices that explain why this new moral culture, which we call “safetyism,” seemed to emerge so rapidly between 2013 and 2015: Rising teen depression and anxiety. The damaging effects of overprotection and social media. The loss of play in childhood. The polarization of the country. New ideas about justice. The bureaucratization of higher education. As we compiled story after story, we noticed that rather than making counterarguments to disfavored claims, students (and sometimes professors) seemed to focus on discrediting the speaker or writer instead. They …