The greatest nation ever is not America, is not China, is not any of those nations but the greatest nation is the MIND. Someone will ask why is it the mind? Yes it is the MIND, that's why it is called IMAGINATION. What do you use to imagine the MIND. America today became what it is because of someone's IMAGINATION. The phone, cars, computers and many others came into existence because of someone's IMAGINATION.
If you want to be big make use of the MIND, imagine how you want your life to be and it will be so. 
yup the mind is world and the world is the greatest nation...