The Rat Bastard Protective Association was an inflammatory, close-knit community of artists who lived and worked in a building they dubbed Painterland in the Fillmore neighborhood of midcentury San Francisco. The artists who counted themselves among the Rat Bastards--which included Joan Brown, Bruce Conner, Jay DeFeo, Wally Hedrick, Michael McClure, and Manuel Neri--exhibited a unique fusion of radicalism, provocation, and community. Geographically...