“Primarily a portraitist,” wrote John Russell of Enrico Baj in a 1976 New York Times review, “he has ruminated with great profit on facts of which we become more daily aware: That every human being is a battleground of opposites.” Key in Russell’s assessment is the word “battleground.” Born in Milan in 1924, Baj’s art career was informed by the political combat zones of his era. His “Generali” series of pseudo-portraits depict caricatured figures in military garb, often with mouths agape. And in 1951, following the bombings of Hiroshima and Nagasaki, he founded the Movimento Nucleare, an artists collective that criticized the use of nuclear weapons. A selection of Baj’s Surrealist and Dada-inspired art is on view at David Nolan Gallery. Included in the exhibition are paintings from the “Generali” series, as well as other irreverent, politically-charged paintings. —Jack Sullivan