Both the US and China are smart.
Definitely the USA. the Americans mostly all have cars. now china wants cars. china has billions of people. with all those cars, that pollution would destroy the ozone layer, and without the ozone we would all die. from either lack of clean water, the filth everywhere, there would probably be a plague starting, lack of food (because nature would all die), heatwave and heatstroke, suffocation (because all the air would be polluted and the trees would be dying as well), and many other causes of death from a long list (i forgot what else i was going to say). and I'm an American so I'm not saying I'm stupid, but i mean no offense to any of the Chinese. sorry china but i think i have a point.
In terms of citizens, the Chinese have a higher IQ average than Americans. (China- 100, US- 98.)
any country is smarter than the US. But sometimes stupid!
us
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China!
China!
After China, the country with the biggest population is India.
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i think that the US army is better because China is a very big country
China
No that would be China.