Which country in the world now has the ability to unify the world?

First of all, no country has the ability to unify the world, but the United States and Russia have the ability to bomb the world seven times with nuclear weapons, so it is possible to destroy the earth. However, unifying the world is not feasible. Everyone has nuclear weapons, but the big deal is that the world will die together.

Secondly, the United States, as the only superpower at present, can occupy most countries militarily if it fights conventional wars, but it is not sure to occupy China, Russian, Indian and other big countries. However, if the United States goes to occupy other countries and has the ambition to occupy the whole world, China and Russia will certainly know about it, so it will definitely embarrass Americans in some small countries. The Soviet Union was so powerful that it stumbled in Afghanistan, a poor country. The United States is so powerful that it is also planted in the quagmire of Vietnam.

Finally, Americans in their own country are unwilling or unwilling to unify the world, because the population of 300 million in the United States accounts for only one twentieth of the global population, but it consumes more than 20% of the global resources and energy. If the world is unified, does it mean that all people should be equal? Equality means that these Americans will reduce energy consumption and their lives will be very unaccustomed, so Americans are not stupid.