Cleanth Brooks (/ˈkliːænθ/ KLEE-anth; October 16, 1906 – May 10, 1994) was an American literary critic and professor. He is best known for his contributions to New Criticism in the mid-20th century and for revolutionizing the teaching of poetry in American higher education. His best-known works, The Well Wrought Urn: Studies in the Structure of Poetry (1947) and Modern Poetry and the Tradition (1939), argue for the centrality of ambiguity and paradox as a way of understanding poetry. With his writing, Brooks helped to formulate formalist criticism, emphasizing "the interior life of a poem" (Leitch 2001) and codifying the principles of close reading.

Brooks was also the preeminent critic of Southern literature, writing classic texts on William Faulkner, and co-founder of the influential journal The Southern Review (Leitch 2001) with Robert Penn Warren.

On October 16, 1906, in Murray, Kentucky, Brooks was born to a Methodist minister, the Reverend Cleanth Brooks Sr., and Bessie Lee Witherspoon Brooks (Leitch 2001). He was one of three children: Cleanth and William, natural born sons, and Murray Brooks, actually born Hewitt Witherspoon, whom Bessie Lee Witherspoon kidnapped from her brother Forrest Bedford Witherspoon as a young baby after the natural mother had died. She later was able to change his name to Murray Brooks and continued to raise him as her own, causing quite a rift in her own family and alienating herself from Cleanth and William. Cleanth mentioned on more than one occasion that she so doted on Murray (Hewitt) that she no longer had a relationship with Cleanth and William. Attending McTyeire School, a private academy, he received a classical education and went on to study at Vanderbilt University in Nashville, Tennessee, where he received his B.A. summa cum laude in 1928 (Leitch 2001). In 1928, Brooks received his M.A. from Tulane University and went on to study at Exeter College, Oxford, as a Rhodes Scholar. He received his B.A. (first class) in 1931 and his B.Litt. the following year. Brooks then returned to the United States and from 1932 to 1947 was a professor of English at Louisiana State University in Baton Rouge (Singh 1991). In 1934, he married Edith Amy Blanchord.

During his studies at Vanderbilt, he met literary critics and future collaborators Robert Penn Warren, John Crowe Ransom, Andrew Lytle, and Donald Davidson (Singh 1991). Studying with Ransom and Warren, Brooks became involved in two significant literary movements: the Southern Agrarians and the Fugitives (Singh 1991). Brooks admitted to reading the Southern Agrarian manifesto, I'll Take My Stand (1930) "over and over" (qtd. in Leitch 2001). While he never argued for the movement's conservative Southern traditions, he "learned a great deal" (qtd. in Leitch 2001) and found the Agrarian position valuable and "unobjectionable" (qtd. in Leitch 2001): "They asked that we consider what the good life is or ought to be" (qtd. in Leitch 2001).

The Fugitive Movement similarly influenced Brooks' approach to criticism. The Fugitives, a group of Southern poets consisting of such influential writers as John Crowe Ransom, Allen Tate, Donald Davidson, and Robert Penn Warren, met Saturday evenings to read and discuss poetry written by members of the group (Singh 1991). The discussion was based on intensive readings and included considerations of a poem's form, structure, meter, rhyme scheme, and imagery (Singh 1991). This close reading formed the foundation on which the New Critical movement was based and helped shape Brooks' approach to criticism (Singh 1991).

While attending the University of Oxford, Brooks continued his friendship with fellow Vanderbilt graduate and Rhodes Scholar, Robert Penn Warren (Leitch 2001). In 1934, Warren joined the English department at Louisiana State, leading Brooks and Warren to collaborate on many works of criticism and pedagogy. In 1935, Brooks and Warren founded The Southern Review. Until 1942, they co-edited the journal, publishing works by many influential authors, including Eudora Welty, Kenneth Burke, and Ford Madox Ford. The journal was known for its criticism and creative writing, marking it as one of the leading journals of the time (Leitch 2001).

In addition, Brooks's and Warren's collaboration led to innovations in the teaching of poetry and literature. At Louisiana State University, prompted by their students' inability to interpret poetry, the two put together a booklet that modeled close reading through examples (Leitch 2001). The booklet was a success and laid the foundation for a number of best-selling textbooks: An Approach to Literature (1936), Understanding Poetry (1938), Understanding Fiction (1943), Modern Rhetoric (1949), and, in collaboration with Robert Heilman, Understanding Drama (1945). Brooks' two most influential works also came out of the success of the booklet: Modern Poetry and the Tradition (1939) and The Well Wrought Urn: Studies in the Structure of Poetry (1947) (Leitch 2001).

From 1941 to 1975, Brooks held many academic positions and received a number of distinguished fellowships and honorary doctorates. In 1941, he worked as a visiting professor at the University of Texas, Austin. From 1947 to 1975, he was an English professor at Yale University, where he held the position of Gray Professor of Rhetoric and Gray Professor of Rhetoric Emeritus from 1960 until his retirement, except 1964 to 1966 (Singh 1991). His tenure at Yale was marked by ongoing research into Southern literature, which resulted in the publication of Brooks' studies of William Faulkner's Yoknapatawpha County (1963, 1978) (Leitch 2001). At Yale, he accepted honorary membership in Manuscript Society. In 1948, he was a fellow of the Kenyon School of English. From 1951 to 1953, he was a fellow of the Library of Congress in Washington, D.C., and was a visiting professor at the University of California, Los Angeles. During this time, he received the Guggenheim Fellowship and held it again in 1960. From 1963 to 1972, he was awarded honorary doctorates of literature from Upsala College, the University of Kentucky, the University of Exeter, Washington and Lee University, Saint Louis University, Tulane University, and Centenary College NJ and Oglethorpe University (Singh 1991).