New Criticism was the dominant trend in English and Americanliterary criticism of the early twentieth century, from the 1920s to the early 1960s. Its adherents were emphatic in their advocacy of close reading and attention to texts themselves, and their rejection of criticism based on extra-textual sources, especially biography. Their readings were brilliant, articulately argued, and broad in scope, but sometimes idiosyncratic and moralistic.
Richards's Practical Criticism is one of the most "theoretical" works of the New Criticism; that is, it is a reflection on critical method.
Wimsatt and Beardsley concisely defined the two anathemas of the New Criticism in their well-known essays "The Intentional Fallacy" and "The Affective Fallacy."