William C. Agee's analysis includes artists working in the first half of the century, such as Arthur Dove, Stuart Davis, Charles Demuth, Marsden Hartley, Georgia O'Keeffe, and John Marin, as well as a discussion of the continuity between this period and the artists who went on to become celebrated internationally, such as Arshile Gorky, Edward Hopper, Helen Frankenthaler, Willem de Kooning, Morris Louis, Robert Rauschenberg, Jasper Johns and Donald Judd.