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The Atom. One World records what, for the artist, was a crucial visual trope associated with his assessment of emerging new technology and its subsequent impact on the world. In presenting an image of the ominous mushroom cloud of a nuclear explosion, Pousette-Dart highlights the irony of world unity attained through the common threat of nuclear destruction. A first generation Abstract Expressionist and founding member of what is known as the New York School, Pousette-Dart was the youngest of this loosely-knit group that included modern art titans such as Jackson Pollock, Mark Rothko, and Willem de Kooning. In 1944, Peggy Guggenheim, a strong supporter of American Abstract Expressionism, gave Pousette-Dart a solo exhibition at her New York gallery, Art of This Century.