Born in Dublin, Ireland, in 1865, William Butler Yeats was the son of a well-known Irish painter, John Butler Yeats. He spent his childhood in County Sligo, where his parents were raised, and in London. He returned to Dublin at the age of fifteen to continue his education and study painting, but quickly discovered he preferred poetry. Born into the Anglo-Irish landowning class, Yeats became involved with the Celtic Revival, a movement against the cultural influences of English rule in Ireland during the Victorian period, which sought to promote the spirit of Ireland's native heritage. Though Yeats never learned Gaelic himself, his writing at the turn of the century drew extensively from sources in Irish mythology and folklore. Also a potent influence on his poetry was the Irish revolutionary Maud Gonne, whom he met in 1889, a woman equally famous for her passionate nationalist politics and her beauty. Though she married another man in 1903 and grew apart from Yeats (and Yeats himself was eventually married to another woman, Georgie Hyde Lees), she remained a powerful figure in his poetry.

Yeats was deeply involved in politics in Ireland, and in the twenties, despite Irish independence from England, his verse reflected a pessimism about the political situation in his country and the rest of Europe, paralleling the increasing conservativism of his American counterparts in London, T. S. Eliot and Ezra Pound. His work after 1910 was strongly influenced by Pound, becoming more modern in its concision and imagery, but Yeats never abandoned his strict adherence to traditional verse forms. He had a life-long interest in mysticism and the occult, which was off-putting to some readers, but he remained uninhibited in advancing his idiosyncratic philosophy, and his poetry continued to grow stronger as he grew older. Appointed a senator of the Irish Free State in 1922, he is remembered as an important cultural leader, as a major playwright (he was one of the founders of the famous Abbey Theatre in Dublin), and as one of the very greatest poets—in any language—of the century. W. B. Yeats was awarded the Nobel Prize in 1923 and died in 1939 at the age of 73.