Race is one of the most elusive phenomena of social life. While we generally know it when we see it, it's not an easy concept to define. Social science literature has argued that race is a Western, socio-political concept that emerged with the birth of modern imperialism, whether in the sixteenth century (the Age of Discovery) or the eighteenth century (the Age of Enlightenment). The editors of this book point out that there is a disjuncture between the way race is conceptualized in the social science and medical literature: some of the modern sciences employ racial and ethnic categories, but they do so to analyze, diagnose, and treat particular conditions such as organ transplants for mixed-race children, heart disease, cancer, osteoporosis, skin disorders, obesity, and gastrointestinal diseases. As such, race has a physical, as opposed to a purely social, dimension. In order to more fully understand what we mean by "race", social scientists need to engage genetics, medicine, and health. To be sure, the long shadow of eugenics and the Nazi use of scientific racism have cast a pall over the effort to understand this complicated relationship between social science and race. But while the contributors of this volume reject pseudoscience and hierarchical ways of looking at race, they make the claim that it is time to reassess the Western-based, "social construction" paradigm. The chapters in this book consider three fundamental tensions in thinking about race: one between theories that see race as fixed or malleable; a second between the idea that race is a universal but modern Western concept and the idea that it has a deeper and more complicated cultural history; and a third between socio-political and biological/bio-medical concepts of race. Arguing that race is not merely socially constructed, the contributors, including Henry Louis Gates, Jr., Ann Morning, Jennifer Hochschild, Rogers Brubaker, Michael Keevak, Carolyn Rouse, and Sandra Soo-Jin Lee, offer a provocative collection of views on the way that social scientists must reconsider the idea of race in the age of genomics.

The role of race in politics, citizenship, and the state is one of the most perplexing puzzles of modernity. While political thought has been slow to take up this puzzle, Diego von Vacano suggests that the tradition of Latin American and Hispanic political thought, which has long considered the place of mixed-race peoples throughout the Americas, is uniquely well-positioned to provide useful ways of thinking about the connections between race and citizenship. As he argues, debates in the United States about multiracial identity, the possibility of a post-racial world in the aftermath of Barack Obama, and demographic changes owed to the age of mass migration will inevitably have to confront the intellectual tradition related to racial admixture that comes to us from Latin America. Von Vacano compares the way that race is conceived across the writings of four thinkers, and across four different eras: the Spanish friar Bartolome de Las Casas writing in the context of empire; Simon Bolivar writing during the early republican period; Venezuelan sociologist Laureano Vallenilla Lanz on the role of race in nationalism; and Mexican philosopher Jose Vasconcelos writing on the aesthetic approach to racial identity during the cosmopolitan, post-national period. From this comparative and historical survey, von Vacano develops a concept of race as synthetic, fluid and dynamic - a concept that will have methodological, historical, and normative value for understanding race in other diverse societies.