A few months after coming to power in April 2018, Ethiopian Prime Minister Abiy Ahmed signed a peace deal to end a decades-long insurgency in the country’s Oromia region. The same summer, he struck a peace agreement with Eritrea, resolving a border dispute that since the late 1990s had produced a two-year war and several smaller-scale clashes. That effort earned Abiy the Nobel Peace Prize in 2019. But his reputation as a peacemaker did not last. By 2020, the Ethiopian government was fighting a brutal war in the Tigray region; the conflict would go on for two years, killing hundreds of thousands of people and displacing more than a million Tigrayans. The 2022 Pretoria Agreement ended hostilities and aimed to secure a lasting peace through measures related to disarmament, humanitarian access, and transitional justice.…