PhD History 1976 University of California, Los Angeles Fields: Africa, southern; Africa, general; Asian American/African American; historical linguistics. Dissertation: "Hunters, Herders, Cultivators, and Traders: Interaction and Change in the Kgalagadi, Nineteenth Century"
MA History 1972 University of California, Los Angeles
BA History 1967 Pacific Union College, Angwin, California
Professor, School of International and Public Affairs, Columbia University, 1999-
Presidential Visiting Professor, Yale University, 2016-2017
Affiliate Faculty, Department of History, University of Hawai'i, Hilo, 2015-
Senior Research Scholar, Columbia University, 2014-2016
Visiting Professor, Center for African American Studies, Princeton University, 2013
Senior Research Scholar, Columbia University, 2005-2007
Visiting Professor, Department of History, Columbia University, 1998-1999
Professor, Department of History, Cornell University, 1995-1999
Visiting Professor, Department of History, Princeton University, 1996
Associate Professor, Department of History, Cornell University, 1990-1995