I’d like to revisit something we talked about on my old blog: the social psychologist Jonathan Haidt’s theory of moral foundations, and how it informs the way we interpret events and act.

A study of children's conversations with their caretakers sheds light on the timeline of the emergence of moral foundation words in the first six years of life in English-speaking children.

When it comes to vaccine hesitancy, one particularly insightful but underappreciated model is the moral foundations theory, which Haidt developed with colleagues. Consider a parent who emphasizes ...