Against the Grain Demographics are destiny, and with 60 percent of the world’s population and some of its fastest-growing economies, this is supposed to be the Asian Century. That is the theme of the book “The Future is Asian” by Singaporean geopolitical consultant Parag Khanna. However, former People’s Bank of China economist Joe Zhang shows his critical thinking skills by showering doubt on the concept. In an era when the earth shows severe strain from human beings, Asia’s population density per square kilometer is more than triple that of Africa and seven times that of North America. Zhang goes on to note how artificial intelligence (AI) and automation may put even greater burdens on countries with larger...