The place of poetry in modern democracy is no place, according to conventional wisdom. The poet, we hear, is a casualty of mass entertainment and prosaic public culture, banished to the artistic sidelines to compose variations on insipid themes for a dwindling audience. Robert Pinsky, however, argues that this gloomy diagnosis is as wrongheaded as it is familiar. Pinsky, whose remarkable career as a poet itself undermines the view, writes that to...