W. S. Merwin, Collected Poems 1952-1993, edited by J. D. McClatchy (New York: Library of America, 2013) ("Poems are written in moments of history, and their circumstances bear upon their language and tone and subject and feeling whether the authors are conscious of that happening or not, but it is hard to conceive of a poem being written only out of historic occasions. Somebody who was not a product of history alone had to be there and feel the need for words, hear them, summon them together." Id. at 193.).
W. S. Merwin, Collected Poems 1996-2011, edited by J. D. McClatchy (New York: Library of America, 2013).