Mark George Tobey was an American painter. His densely structured compositions, inspired by Asian calligraphy, resemble Abstract expressionism, although the motives for his compositions differ philosophically from most Abstract Expressionist painters. His work was widely recognized throughout the United States and Europe. Along with Guy Anderson, Kenneth Callahan, Morris Graves, and William Cumming, Tobey was a founder of the Northwest School. Senior in age and experience, he had a strong influence on the others; friend and mentor, Tobey shared their interest in philosophy and Eastern religions. Similar to others of the Northwest School, Tobey was mostly self-taught after early studies at the Art Institute of Chicago. In 1921, Tobey founded the art department at The Cornish School in Seattle, Washington.

Abstract expressionism in the United States emerged as a distinct art movement in the immediate aftermath of World War II and gained mainstream acceptance in the 1950s, a shift from the American social realism of the 1930s influenced by the Great Depression and Mexican muralists. The term was first applied to American art in 1946 by the art critic Robert Coates. Key figures in the New York School, which was the epicenter of this movement, included such artists as Arshile Gorky, Jackson Pollock, Franz Kline, Mark Rothko, Norman Lewis, Willem de Kooning, Adolph Gottlieb, Clyfford Still, Robert Motherwell and Theodoros Stamos among others.