My preferred solution would be accountability. But I have given up hope that the New York Times will perform its proper editorial function. So, instead, I would suggest the intellectual equivalent of an antitrust law. For every word that Krugman publishes, he must henceforth commit to having first read at least a hundred words by other writers. I cannot guarantee that reading more widely will teach him honesty, humility, and civility. But it will at least reduce his unjustifiably large share of the marketplace of economic ideas.