Ujamaa and Ubuntu: Conceptual Histories for a Planetary Perspective - Hardcoverby Bo Strth (Author) The book argues that a new conceptualization of 'the global' and 'the planet' requires input from African and Asian language cultures. Author Biography Bo Strth is professor emeritus. He was Professor of Nordic, European and World History at the Helsinki University (2007 2014), Professor of Contemporary History at the European University Institute, Florence (1997 2007), and Professor of History at the Gothenburg University (1991