Amid gloomy forecasts of the decline of the humanities and the death of poetry, Angus Fletcher, a wise and dedicated literary voice, sounds a note of powerful, tempered optimism. He lays out a fresh approach to American poetry at large, the first in several decades, expounding a defense of the art that will resonate well into the new century. Breaking with the tired habit of treating American poets as the happy or rebellious children of European romanticism,...