Actually China has longstanding demographic, environmental and political problems that make its eventual dominance far from certain. They're moving away from th

Actually China has longstanding demographic, environmental and political problems that make its eventual dominance far from certain. They're moving away from the one-child policy too late, they're deep into the modern low-fertility-preference zone now (but more so than other modern countries because of environmental constraints), and there is no prospect of significant immigration to pick up the slack.