Ethiopian Prime Minister Abiy Ahmed governs like a man running short on time. After less than six months in office, the youthful leader has presided over impressive internal ethnic and political reconciliation, has established peace with Eritrea and has begun ambitious economic privatization efforts. The changes have come so quickly that many question whether they are sustainable. And while there are many limitations to just how much Abiy can accomplish, it's very possible that he will establish a new level of stability and economic opportunity in the East African country of 100 million people....