Historical Context of United States
The United States has been a major country in the evolution of modern and contemporary art in the twentieth century, particularly in the post war period, when the cultural importance of New York asserted its influence over Paris, formerly thought of as the most important art centre globally. Major art movements established and cultivated in extensive ways throughout the United States include Abstract Expressionism in varied forms, Pop Art, including its West and East Coast branches, Minimalism, Conceptual Art, Neo-Expressionism, Graffiti and Street Art, plus various post-modern repetitions of these many types. In the modern and contemporary sphere, the United States has exercised a prevailing influence over the global visual culture, due to the authority of its economic and political institutions. Key examples of critically acclaimed U.S artists of the modern and contemporary period include Jackson Pollock, Mark Rothko, Jasper Johns, Robert Rauschenberg, Cy Twombly, Andy Warhol, Roy Lichtenstein, Frank Stella, Donald Judd, Cindy Sherman, Barbara Kruger, Julian Schnabel, Jean-Michel Basquiat and Keith Haring.