Widely acknowledged as one of the most important photographers of the 20th century, Garry Winogrand (1928-1984) captured moments of everyday American life in the postwar era, producing an expansive picture of a nation rich with possibility yet threatening to spin out of control. He did much of his best-known work in New York in the 1960s, becoming a major voice of that tumultuous decade. He photographed the rich and powerful and everyday strangers on the street; antiwar protesters and politicians; airports and zoos. In many of these pictures, humor and visual energy are the flip sides of an anxious instability. Tickets at SFMOMA.org. Open Monday-Tuesday and Friday-Sunday from 11am-5:45pm; Open until 8:45pm on Thursdays. Closed on Wednesdays.