Ethiopian Prime Minister Hailemariam Desalegn resigned Feb. 15 amid continued discontent in the country and disagreements within his ruling Ethiopian People's Revolutionary Democratic Front. Desalegn assumed power after Meles Zenawi died in 2012, but the government had been facing demonstrations since 2015 that largely centered on its inability to manage Ethiopia's ethnic differences. Though Desalegn hails from the small Wolayta group, Ethiopia's Tigray minority has largely wielded power over more numerous groups such as the Amhara and the Oromo since rebels led by Zenawi overthrew a communist government in 1991....