Abstract Expressionism was a post-World War II American art movement developed in New York in the 1940s that expressed the artist's inner feelings through non-representational use of form and color, divided into action painting typified by Pollock and color field painting practiced by Rothko. Pop Art emerged in the 1950s in Britain and United States as a style exploring everyday consumer culture imagery from advertisements, products, celebrities, and comics, with leading artists like Warhol, Rauschenberg, and Lichtenstein.