Abstract Expressionism emerged in New York City in the 1940s as artists rapidly applied paint to large canvases in an expressive style, drawing from Surrealist ideas of tapping the unconscious mind. There were two main types: action painting, which emphasized the artist's hand movements and texture, and color field painting, which used broad areas of color. Famous artists like Jackson Pollock, Willem de Kooning, Arshile Gorky, Mark Rothko, and Clyfford Still developed techniques like dripping and splattering paint to create emotional, non-representational works focused on the creative process over any subject matter.