Joy comes too from watching an imaginative new kind of theater emerge. It doesn't come from nowhere, of course: In some ways, 'What the Constitution Means to Me' recalls Lisa Kron's memoir play 'Well,' in which a prepared speech about urban decline is hijacked by a mother who begs to differ. In other ways, Ms. Schreck's play seems to be part of the wave of formal experimentation being led by young black playwrights today. Linking these works is a sense of backlash and betrayal. But in the wake of tragedy, Ms. Schreck offers something more than catharsis. 'What the Constitution Means to Me' is one of the things we always say we want theater to be: an act of civic engagement. It restarts an argument many of us forgot we even needed to have.