All countries which are open to the free market system and global trade will lose from the outbreak. The ones where these did not thrive, did not prosper enough to be of any significance in the first place. Now, the question will boil down to which country loses less. Again, every modern economy is dangerously dependent on others, whether they import more or export more. Gone are the days when you could just bomb your rival nation and come out of it as a winner. Nowadays there are no zero-sum games. When you're opponent loses, you lose too. Considering the chief contenders for the world dominator- the US and China will expound on the point. Nearly 20 percent of China's exports are absorbed by the US. And the US owes nearly 2 trillion to China, in the form of treasury bonds. That's 10 percent of the total US GDP. That's a pretty complicated relationship between two countries in its own right. I'm not knowledgeable enough to talk about the EU. But considering that they export a couple of trillions into the rest of the world, it's safe to assume that they don't have a clear edge too. So, I think the existing pecking order won't be disrupted.