Clement Greenberg (January 16, 1909 - May 7, 1994) was an influential American art critic closely associated with the abstract art movement in the United States. In particular, he promoted the Abstract Expressionist movement and had close ties with the painter Jackson Pollock. Wikipedia
The definitive Wikipedia entry for Clement Greenberg. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Clement_Greenberg