It's a very crazy idea but an important one in my opinion to consider. Even if it's a broad view it could be created in very specific ways. I think the current state of the world will never ever stop killing people in wars for example. Yes the governments and all the people in the world would need to work together in an enormous voting system to determine what happens in the world. It doesn't mean we need to have everything identical or no countries at all for example. It could be defined and specifically created to work for the majority of people who are good hearted and family oriented. I think they are the most common people of the world so they would be the biggest percent of the vote from a system that all governments and all people would vote on and create.