I'm writing a story. In this story, a sufficiently advanced alien descends to Earth, and bestows esper abilities on a third of humanity.(A rank 5 electric Esper for example can generate a 100 Gigawatts(tentative) of electric power constantly).
Following that pandemonium broke out, and several factions, secret society and organisations tried to use the chaos as a means to further their agenda. Guilds were formed among espers, and the Third World War; The Guild War began and was fought for 2 years. The war did not degenerate into a Nuclear war, due to intervention by the Protagonist's former guild(a genius computing prodigy gained the ability to interface with electronics, and systematically locked down all nuclear armaments globally).
Our chief antagonist Arthur, is a member of a faction called the British Imperialists. He managed to outwit our genius protagonist and win over most of his former guild.
After the protagonist's defeat, he worked to unite the world into one Empire. About 2 thirds of the guilds joined him and in the two years since then, he managed to gain 75% support.
For the Geopolitics what I've got so far is:
The British Commonwealth, was united into "The Great Kingdom of Britain", due to the British Imperialists.
The former USSR forms "The Great Kingdom of Russia"
China and Taiwan have been united to form the Great Kingdom of China. Manchuria, Nepal, and some of China's neighbouring countries have been annexed by "The Great Kingdom of China".
I'm thinking of a United E.U, but I'm not sure.
Africa is divided; I'm not sure whether the divisions should be as they are now, or should be larger.
I don't know how South and Central America would be like.
Maybe Arab Asia and Northern Africa should unite into one Caliphate?
Oceania would be annexed by "The Great Kingdom of Britain"
Also, "The Great Kingdom of Britain", would have desired the USA, as it was former Crown territory.
So help please?
How'll the USA look like? How'll central and Southern America, Africa and the rest of Asia be? Should the EU be united?
I want a believable post war Geo politics.