Because she works in fashion, it’s easy to forget how political a creature Miuccia Prada has always been. Famously secretary of Milan’s Communist party at one point, she is intimate with activism. But her activist impulse has usually found expression in the art world, where she has tirelessly championed the new. Tonight, she continued on that course—bringing in a group of mural artists to decorate the venue—while, at the same time, making a feminist statement that, in the light of the contemporary denigration of the very notion, came across as radical. “I want to inspire women to struggle,” she said, after a show that will be hard to beat as the season’s high point.