Historical Context of United States
The United States has been key 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 assumed primacy over Paris, formerly thought of as the most significant art centre internationally. Major art movements developed and fostered in extensive ways throughout the United States include Abstract Expressionism in various forms, Pop Art, including its West and East Coast variants, Minimalism, Conceptual Art, Neo-Expressionism, Graffiti and Street Art, plus various post-modern echoes of these many types. In the modern and contemporary sphere, the United States has exercised a prevailing influence over the international visual culture, due to the authority of its economic and political structures. Key examples of world renowned 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.