Mitchell Siporin: A Voice for the Working Class Mitchell Siporin (1910-1976) stands as a significant figure in American Social Realism, remembered primarily for his monumental murals and unwavering commitment to portraying the realities of labor movements and working-class life. Born in New York City to Polish immigrant parents—Hyman, a truck driver, and Jennie Siporin—his formative years were spent in Chicago where he honed his artis…