Reality is more complex than that. Every waking moment, someone is being born into the world in joy, someone far too young dies in horror. For every rich success, billions live in squalor, desperate for the simple staples of food, shelter and clothing. For every Einstein there are 5k nitwits out crying about their right to bear arms and defending Christmas.
Reality is a complex, dynamic mix of truths, lies, half truths and no idea of what is true.
On the cynical side, it would be easy to imagine Planet Earth as a petri dish. Take a dish, put some gelatin in it and add a few bacteria. In this miniature 'Eden' the bacteria will grow and thrive until it overruns the dish and consumes everything in the dish. And then they consume each other. It is easy to imagine earth as one huge -but very finite- 'dish'. And we are the plague that will populate it, consume it, populate it more -until there is nothing left to consume. And if you think that is not possible, ask the endangered species that vanish year in, year out, how humanity has impacted this closed set dish.
In light of that, nations are nothing more than the organized vehicle of that ultimate end. That's the glass half full version.
On the opposite, the trajectory of humanity has been that man has made great strides in providing for the greater good. Leaders once owned the land and people they ruled. Women had no voice. Only in brief instances were Gays and Lesbians allowed any sense of dignity. Slavery was rampant and common place. One could own and abuse people, weaker countries, workers. But nations have evolved to much that is better. If the trajectory holds, nations in our future will be better nations than in our past.
The truth is we live in these contradictions and the stakes are enormous. And if we are to survive and thrive, rather than be like that dish.... We need to get smart. Thing in larger, concrete, complex ways. There is no simple to hang on to.
The USA is "number one" as a military power because we irrationally spend like 400x what any other nation spends. For multiple reasons they aren't that stupid. And thanks to us being stupid, it frees a great many of them form going there. It is the military industrial complex run amok. And it is run amok on borrowed money. And it dangerous when combined with simple minded leaders "licensed to kill" and a populace convinced of their moral superiority -and uninformed view of the world. China won't need anyone other than themselves to speak Mandarin when they can say, "I own you." in their native tongue and English.
There is no #1 slot to take over or be taken over. The planet is not a giant basketball caught in the sun's gravitational pull. We are all one species on a living, dynamic planet where at any given moment great joys and great sorrows play out in an profoundly complex web. All lives intertwined. Begging for humanity to get smart.