Henry David Thoreau American literature 3 History and criticism 3 Literature 2 Ralph Waldo Emerson 2 Walt Whitman 2 American Literature 1 American Renaissance 1 Antislavery 1 Bienen 1 Biopolitics 1 Classic Literature 1 Darwin, Charles 1 Darwinian literary critical methodology 1 Ecocriticism 1 Ecology in literature 1 Ellery Channing 1 Enthusiasm in literature 1 Essays 1 Evolution 1 Evolution (Biology) in literature 1 Evolutionary Theory 1 Ezra Pound 1 Frank O'Hara 1 Frederick Douglass 1 History 1 Humanism 1 Immanuel Kant 1 Influence 1 Intellectual life 1