In 1967, the Italian art critic Germano Celant published “Notes for a Guerrilla War” in the magazine Flash Art. He wrote that while Americans were making Pop art in response to an industrial period of prosperity, Italians were doing something different. In the early 1960s, they were reaching for humanism, veering away from the cold-cutting use of consumer-culture imagery and machinery. Celant called the movement Arte Povera, and the name stuck. This exhibition present works by leaders of the movement. Highlights are Michelangelo Pistoletto’s mirror paintings and Alighiero Boetti’s photocopied pieces. —Elena Clavarino