Teaching African farms how to farm is not enough; they must be taught to start, run and grow a business, writes Tamar Haspel. Joe DeVries is American, but he has spent three decades in Africa, helping farmers improve yields, fight pests and control disease. I met him in his office in Nairobi and asked how he'd ended up so far from home. He told me his career dated to one moment, when he was an undergraduate studying agronomy. “I was in the back of the class,” he said, “probably falling asleep. And the professor looked at us and said, 'One of you will go out there and make the world a smaller place.' Somehow, I knew he was talking to me.” Read more