A prolific poet and translator, W.S. Merwin’s style has changed over the years from traditional to free form. Merwin won the Yale Series of Younger Poets Prize for his first book, A Mask for Janus, published in 1952, and the Pulitzer Prize for his 1970 collection The Carrier of Ladders. Merwin currently lives in Hawaii; he is a devoted environmentalist and many of his poems take up ecological themes. He was appointed Poet Laureate of the United States in 2010.