Greenberg first established his reputation writing for the Partisan Review, which he joined as an editor in 1940. He became art critic for the Nation in 1942, and was associate editor of Commentary from 1945 until 1957. His seminal essay, "Avant-Garde and Kitsch" set the terms for the ongoing debate about the relationship of modern high art to popular culture. Though many of his ideas have been challenged, Greenberg has influenced generations of critics, historians, and artists, and he remains influential to this day.