How would the centralization of world’s power affect politics and society in general? The society should be set in a period where artificial intelligence is well advanced to supplement in areas such as security- like in the use of intelligent tiny drones (millions of them) fitted with intelligent algorithms and smart cameras that can track the location of each person in the world throughout the day.
Also, the central government should be benevolent but opposed to free market capitalism and unregulated democracy. Think of it as the kind of political and economic system in China today. All countries like the US, Uganda, India etc. should be under this same rule. In short, it's like China of the future rising to control all of the world.