William Butler Yeats (1865-1939) was a towering figure in 20th-century literature, widely regarded as one of the greatest poets writing in the English language. His work ranges from the romantically evocative early lyricism to the more modernist influences in his later years. Born in Dublin, Ireland, Yeats was deeply involved in the Irish Literary Revival and co-founded the famed Abbey Theatre, playing a significant role in introducing the country's cultural heritage to the world. Yeats' extensive oeuvre includes such collections as 'The Rose' (1893), 'The Tower' (1928), and 'The Winding Stair and Other Poems' (1933). His 'Poems' comprise symbolist poetry, drawing on Irish mythology and folklore, infused with a distinctive metaphysical vision that reflects his interest in mysticism and the occult. Yeats was awarded the Nobel Prize in Literature in 1923, with the Nobel Committee highlighting his 'always inspired poetry, which in a highly artistic form gives expression to the spirit of a whole nation.' His literary style evolved throughout his life, yet his work remained characterized by a rhythmical complexity and a powerful, evocative imagery that sought to voice the tensions of his era. Widely studied and revered, Yeats continues to influence poets and scholars alike.