Sibling relationships have been underemphasised in learning about child development.

As we grow up, we're constantly defining ourselves. In my case: Caucasian, male, born in Iowa, live in Boston, Zen Buddhist, good at learning languages. With countless labels, I build up this creation I call my self.

We make artificial divisions everywhere: Democrats and Republicans, black and white, millennials and baby boomers. Even those of us who are against building walls find ourselves pointing accusing fingers at those wall-builders.

An essential question regarding treatment is whether psychodynamic therapy is effective for specific disorders.