I always think W.S. Merwin's poems will last of anyone writing today. If I had to bet on posterity I would bet Merwin. My poems could easily evaporate. So I don't know. If you find yourself as a writer thinking about posterity you should probably go out for a brisk walk or something.
Billy CollinsAnd I should mention the light which falls through the big windows this time of day italicizing everything it touches.
Billy CollinsI thought originally when I was in school and I wanted to be a poet, I knew that poets seemed to be miserable.
Billy Collins