Abiodun William spent years working with Kofi Annan, the seventh Secretary-General of the United Nations. His new book Kofi Annan and Global Leadership at the United Nations (Oxford University Press) explores Annan’s legacy, examining Annan’s decisions during a turbulent period in world affairs and offering lessons for contemporary policymakers.Williams is a double alumnus of Fletcher, earning both a MALD and PhD from the school. Today, he teaches at Fletcher and Tisch College as a Professor of the Practice of International Politics.