Many on the left see national identity as an unwanted relic of a dark and dangerous past. Yet identities based on sexuality or race are championed. Does our need to belong somewhere make prejudice against, and conflict with, others inevitable? Could we do away with tribal allegiances and see ourselves as part of the same human family? Or is association with a given tribe, be it based on class, race, sexuality or nationality, the primary vehicle for political change even if it is also the source of tension, dispute and warfare?