The last time I visited Zimbabwe, 15 years ago, it was the breadbasket of southern Africa. It didn’t look economically dynamic and the sense of “watch what you say” oppression was palpable, but the main roads were being fixed, crops were growing, and the cities seemed to function. It was obviously a far better-run country than Kenneth Kaunda’s Zambia in that day. Today, Zimbabwe has 90% unemployment and people are literally starving–in a nation that used to export its crops...