Clement Greenberg, occasionally writing under the pseudonym K. Hardesh, (January 16, 1909 – May 7, 1994) was an American essayist known mainly as an influential visual art critic closely associated withAmerican Modern art of the mid-20th century. In particular, he is best remembered for his promotion of the abstract expressionist movement and was among the first published critics to praise the work of painterJackson Pollock.