The family assembles. This is often for a holiday, a funeral, or a crisis. The exposition is delivered through ritualistic behavior: the seating arrangements, the passive-aggressive compliments, the rehearsed smiles. The inciting incident is usually a micro-aggression —a toast that isn't made, a chair that is removed, a name that is forgotten. By the end of Act I, the audience must know who hates whom, but not yet why.