Philip Appleman is Distinguished Professor Emeritus at Indiana University, where he was a founding editor of Victorian Studies. He is the author of The Silent Explosion, and of several award-winning volumes of poetry, including Darwin's Ark and New and Selected Poems: 1956-1996, as well as three novels, including Apes and Angels. He is editor of the Norton Critical Edition of Thomas Malthus' An Essay on the Principle of Population, and coeditor of 1859: Entering an Age of Crisis.