A few days ago I called Oleksandr Abakumov, a senior detective at the National Anti-Corruption Bureau of Ukraine. I wanted to ask him about his investigation into a kickback scheme in his country’s energy industry. While we were talking, I got interested in Abakumov himself. As he was explaining his motivations, I was struck by the surprising contrast between people like him—the Ukrainian civil servants and civil-society activists who have been demanding transparency from their leaders for two decades—and the American and Russian negotiators who met this week in Moscow,…
