The document provides background information on Abstract Expressionism, also known as the New York School. It summarizes key events and influences that led to the development of this post-World War II art movement in New York City in the 1940s-1960s. It profiles several influential Abstract Expressionist artists like Jackson Pollock, Willem de Kooning, Mark Rothko, and Robert Motherwell and describes their signature styles like action painting and color field painting.