If you don't think a debate about whether light behaves like a particle or a wave can make for good theater, then you've never seen gripping, brilliant plays of ideas like Michael Frayn's Copenhagen or David Ives' New Jerusalem.
Rapture and Rand: What a couple of sexy, compelling twins! Both offer unsparing moralistic revenge fantasies. Both solicit your agreement and your endorsement in exchange for your salvation.
The first must-see, which may come to be regarded as a modern classic, is August: Osage County. Think Edward Albee meets Eugene O'Neill by way of black comedy.