Proletarian poetry is a political poetry movement that developed in the United States during the 1920s and 1930s that expresses the class-conscious perspectives of the working-class. Such poems are either explicitly Marxist or at least socialist, though they are often aesthetically disparate. As a literature that emphasized working-class voices, the poetic form of works range from those emulating African-American slave work songs to modernist poetry. Major poets of the movement include Langston Hughes, Kenneth Fearing, Edwin Rolfe, Horace Gregory, and Mike Gold.