David Northrup (PhD, University of California, Los Angels) is professor of history at Boston College, where he teaches courses on the history of sub-Saharan Africa, international migrations, and world history. His research has dealt with precolonial Nigeria, early colonial Congo, the Atlantic slave trade, Asian and African indentured labor migration, and African encounters with Europe in the precolonial era. His publications include Africa’s Discovery of Europe, 1450–1850 (2002), The Atlantic Slave Trade (2002), and Indentured Labor in the Age of Imperialism, 1834–1922 (1995). Recent books include Africa's Discovery of Europe, 1450-1850, Second Edition, (2009), The Atlantic Slave Trade, Third Edition, (2010), and The Diary of Antera Duke: An Eighteenth-Century African Slave Trader (2010). Northrup served as president of the World History Association in 2004–2005.