CHURCHVILLE, VA—For 25 years, the Washington Post has praised organic foods—while I warned that low-yield organic farming posed a threat to the world’s wildlife. I estimated that Norman Borlaug’s Green Revolution not only saved billions of people from starvation, but at the same time saved 7 million square miles of wildlife habitat that would otherwise have been plowed down for more low-yielding crops. Seven million square miles is the land area of South America. That’s “high-yield conservation.”