Imagine sitting in a meeting where a new proposal is being enthusiastically endorsed. Heads nod around the table in approval. Yet something about it strikes you as misguided – that somehow the agreement arrives before thinking does. You hesitate and wonder whether it is wiser simply to remain silent. Or perhaps you are at a social gathering where everyone seems caught up in the same easy bonhomie. Yet you feel curiously detached from it all. Moments like these can be disconcerting. We are social creatures, after all, and belonging matters deeply to us. Feeling out of step and out of...