I dream of a world in which there's only one Earth government. Lots of sci-fi works present this scenario.
If I have to make it happen (remove all countries and setup one Earth government), what would be the ways to do that?
Few things which anyone can think:
Politics. Some kind of political network which assumed control in all major countries.
Military. Let's say a country has developed the ultimate weapon like Antimatter Death Ray (fired from satellites) which can sweep entire countries in seconds and can target nuclear weapons. After demonstration of the weapon on one country, the government can ask for surrender from other countries.
Few things in my mind (which can be non-realistic):
Let's say, I launched perfect Self-driving Vehicles (or, acquired Google to do that). After massive advertisement, I managed to replace every traditional vehicle in the world. Now, there are billions of Self-driving Vehicles in the world. Despite all checks by governments, I managed to put backdoor in the vehicles. Now, I have power to control all commercial routes or I can simply turn the world into hell with billions of weapons at my fingertips. Then, I asked for surrender from all countries for better cause.
Let's say, I invented psychic field (and permeated the whole Earth) which can hack human's brain. I don't think, I need to say more. :)
I want this to be a mainly political move with enough military backing to enforce it. This must be achieved somehow using modern borders and ethnicity differences via a political power with a sufficient military backing to enforce it. Possibly from the UN? What are your ideas to achieve this?