In nineteenth-century Europe, differences among human bodies were understood to be matters of scientific classification. At the height of scientific acceptance, it was unthinkable that race or sex or diagnosis or indigence were invention. Today, however, differences among human bodies are understood as matters of social construction. The philosophy of social construction understands differences among humans to be matters of human imposition. Social constructionism's way of understanding the origin of differences among humans is so well-established as to have no currently viable alternatives, even among new materialists, social constructionism's most ardent critics. This book argues that new materialists and social constructionists share a distinction between the political and the ecological. Emily Anne Parker centers her argument on the philosophical concept of the polis, according