Take it on faith: see Marin's Whipping Man
If Matthew Lopez were a miner, he could brag that he uncovered a rich mineral vein of enormous wealth, both cultural and commercial. But Lopez isn't a miner. He's a playwright, and though there are similarities to be sure, what Lopez brings to the surface in his fascinating play The Whipping Man is a mostly untold chapter of American history with deep spiritual resonance. Lopez, whom Bay Area audiences met earlier t…