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By Fareed Zakaria
As Moscow continues to send its forces into Ukraine, it seems clear that Putin's Russia presents America and the West with a frontal challenge. But in the longer run, it is not Russia's overt military assault but China's patient and steady non-military moves that might prove the greater challenge.
Russia is a great power in decline. Its economy amounts to just 3.4 percent of global GDP. China's is nearly 16 percent and rising, now almost four times the size of Japan's and five times that of Germany's, according to the World Bank.
Presidents Obama and Xi deserve the accolades they are receiving for their historic agreement on climate change, and it seems to suggest that America and China are moving towards a new, productive relationship.
Except that, even while signing these accords, Xi Jinping's government has been taking steps that suggest it is developing a very different approach to its foreign policy – one that seeks to replace the American-built post-1945 international system with its own.
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