Here’s a scenario. The Earth is finally advanced enough to discover and arrive at a planet with an advanced civilization whose average IQ is 70, good enough to develop their own natural language but not quite enough to handle high school mathematics. What will you do? Are you going to conquer them? Probably not, because by then your robotics is advanced enough that you won’t need human slaves anymore. Are you going to kill them all? Probably not, because it gives you no reward. Most probably, you will build a base there and live in peace with them. They will not be smart enough to handle diplomatic relationships, so there will be no nation-to-nation relationships. So, why don’t aliens do that with the Earth? There are two possibilities, the first being that they are not able to do so yet and the second being that they don’t want to. Why not? Well, it is possible that they come to the Earth in a mobile parallel universe, where they are able to assemble all possible molecules from photons alone. Let there be light and the rest follows. They don’t need planets anymore. They are just looking for planets that may eventually harbor advanced civilizations able to compete with them. While humans currently may not be smart enough to compete with them, the next ruler of the Earth might. That explains the motif behind UFO phenomena.
The Milky Way is a galaxy almost as old as the universe. That should provide enough time for superintelligent life forms to arise. However, that doesn’t seem to represent the status quo. As a matter of fact, there should be no superintelligent life form at all within the Milky Way who could have conquered the entire galaxy. Why not? Extinction events, most probably caused by the periodic vertical fluctuations of all stars orbiting the Milky Way. In other words, all life forms in our galaxy are too young to survive their next extinction events. Any superintelligent life form must have come from outside of the Milky Way, from a far, far away galaxy where natural extinction events are less frequent. Within the Milky Way, most intelligent life forms are probably similar to humans in general intelligence, all of whom struggling to find their neighbors in the galaxy. They will mostly be mammals, but I will talk about that later.
A few hundred years from now, the following nations will probably still be dominant on the Earth: US, Russia, China, India and probably France. US will remain number one or at least number two for the next few centuries. India will become like China. With the exit of UK from EU, Germany will not be able to compete with a French-Italian liaison in Europe, unless it sides with US or Russia to work out some miracle. France will be the leader of Europe, seeking military and economic independence from US. As a result, both UK and Japan will form closer relationships with US, hence the Pacific Ocean and the Atlantic Ocean to be its two wings or theaters, a platform to ensure American global dominance for the next hundreds of years. India will dominate the Indian Ocean, while Russia and China will remain continent-based global powers, both seeking stronger ties with Europe and India to counter an American world.
That’s about it. I will introduce lots of Tang poetry and Song contractual lyrics in my new science fiction based on this setting. The world will be a lot more peaceful following the invention of gravitational weaponry, each warhead capable of destroying a planet completely. China will play the French game to promote its own cultural influence in the new world, positioning itself as the cultural center of the new order.