William Butler Yeats (1865-1939) was an Irish poet, playwright, and one of the foremost figures of 20th-century literature. A co founder of the Abbey Theatre and a key figure in the Irish Literary Revival, Yeats's early work was marked by romanticism and Irish mythology, later evolving into a more modernist style rich in symbolism and political themes. His major collections include The Tower and The Winding Stair, showcasing his profound reflections on aging, history, and national identity. Awarded the Nobel Prize in Literature in 1923, Yeats remains celebrated for his lyrical mastery and deep influence on modern poetry