Little known in the English-speaking world, Burundi is Rwanda's twin, a small Central African country with a complex history of ethnic tension between its Hutu and Tutsi populations that has itself experienced traumatic events, including mass killings of over 200,000 people. The country remained in a state of simmering civil war until 2004, after which Julius Nyerere and Nelson Mandela took turns as mediators in a lengthy, and eventually successful, peace process which has endowed Burundi with new institutions, including a new constitution that led to the election of Pierre Nkurunziza as...