“Sculpture exists on its own, it is an entity,” wrote the American sculptor David Smith (1906–1965) in 1952. “I want you to travel, by perception, the path I traveled in creating it.” A pioneer of Abstract Expressionism, Smith rejected traditional carving and casting, turning instead to modern industrial techniques. He worked in isolation, near the Adirondack Mountains in upstate New York, and produced large steel geometric sculptures, which he arranged in the fields surrounding his house. Hauser & Wirth presents sculptures from each decade of Smith’s career. Drawings, paintings, and sketchbooks, some never exhibited before, are also on view. —E.C.