"What works, evidently, is cultural diversity. This should not come as a surprise. If culture is viewed as a biological phenomenon, then we should expect to see diversity favored over uniformity. A thousand designs—one for every locale and situation—always works better than one design for all locals and situations. Birds are more likely to survive in ten thousand nest patterns than in one. Mammals are more likely to survive in ten thousand social patterns that in one. And humans are more likely to survive in ten thousand cultures than in one—as we are in the process of proving right now. We’re in the process of making the world unlivable for ourselves—precisely because everyone is being forced to live a single way. There would be no problem if only one person in ten thousand lived the way we live. The problem appears only as we approach the point where only one person in ten thousand is permitted to live any other way than the way we live. In a world of ten thousand cultures, one culture can be completely mad and destructive, and little harm will be done. In a world of one culture—and that one culture completely mad and destructive—catastrophe is inevitable."