HISTORY OF ART & DESIGN STYLES: FROM 1900 -. A radical re-evaluation of American modernism. The importance of American artists in the history of modern art is well-known and well-documented, from Jackson Pollock to Mark Rothko and Andy Warhol. However, the work of such artists did not spontaneously appear after World War II, nor was it simply transplanted from Europe. There is a longer, subtler history of the development of modernism in relation to American artists, as well as teachers, patrons and collectors, which can be traced through the first half of the twentieth century.