American efforts to control Chinese firms abroad are dangerous

WARS are fought with weapons, but also with money. To understand the global balance of power in the coming decades, it helps to pay attention to the commercial subplot of the North Korean crisis. For the first time, America is attempting to use its full legal and financial might to change the behaviour of Chinese companies and banks, which it believes are propping up North Korea by breaking UN and American sanctions. Some American politicians have concluded that, as China’s firms have integrated with the global economy, they have become more vulnerable to Uncle Sam’s wrath. America has potent weapons, but the trouble is that China can retaliate in devastating fashion.