William D. Phillips, Jr. is Professor Emeritus of History at the University of Minnesota. His previous publications include The Worlds of Christopher Columbus (with Carla Rahn Phillips, 1992), which received the 'Spain in America [Second] Prize', awarded by the Spanish government. He has also written extensively on the history of slavery, including Slavery in Medieval and Early Modern Iberia (2013). Carla Rahn Phillips is Union Pacific Professor Emerita at the University of Minnesota Twin Cities. Her research focuses on the history, society, and economy of Spain, 1500 to 1800. She has received awards from the American Historical Association, the American Association of Publishers, and the government of Spain, most recently the Premio de Historia de Órdenes Españolas, presented by King Felipe VI in 2024.