What does suffering look like? Is it a facial expression or a gesture, a moment or a condition? German artist Käthe Kollwitz saw it in all its manifestations as a basic part of the human experience. It sparked her creative urge while her country lost two world wars, visiting her as heartache for mankind and grief closer to home. A somber exhibition of her work by the William Benton Museum of Art at the University of Connecticut in Storrs puts suffering front and center. It also explores how she translated her compassion into action. "Käthe Kollwitz: Activism Through Art" is less about politics than its title implies. Though human misery is often political, the core of the show is not the posters and leaflets she made for progressive causes but universal scenes untethered to specific events.