The extent of the shift becomes clearer when you look at the US-China equation. We are today dealing with a China whose accumulation of power is unprecedented in history, in both pace and extent. In 1990 the US economy was eight times the size of China’s. Today, in less than a quarter century, the two economies are roughly level. And they depend on each other. The balance of economic and political power has shifted. The balance of military power is also shifting, though at a glacial rate, much, much slower than the economic shift.