It would be a big responsibility and honor to run the world. If I were chosen to rule the world, I would do many things. The first thing I would do is invent a program that saves all of your copies and pastes. Why hasn't someone come up with that yet? Next, I would make sure that everyone has shelter, food, and clean water. I would take money from the rich because, honestly, other people need that money more.
Next, I would improve the environment. I would ban all of the harmful ingredients in the food we eat. Why is it allowed in our food when it's not good for us? It's not like I would get rid of desserts and other not-so-healthy treats, only the harmful ingredients. I would also make sure all of the crops are organic, and not sprayed with pesticides, or whatever they use to make it "better." I would also designate patrol squads all around the world to pick up trash from beaches and parks because littering isn't doing any good for anybody.
I would also implement a universal language. I would make the universal language Spanish or English because a lot of people already know it. I wouldn't get rid of the other languages, though. In my world, kids would learn two languages, one that their parents already know, and either Spanish or English. For the people that already know Spanish or English, they can choose another language to learn. It's a good way for us to communicate with each other. This would be enforced in schools. I would also make education free because it's important to be educated. In order to make it far in society, you need to be well educated, and I don't believe in paying money for wanting to learn.
The last thing I would do is take some of the rich people's money again (sorry rich people, you'll be fine) and take it and put it into exploring space and our oceans. I think it's a very important part of life, and even though we know a lot already, we don't know nearly enough. Putting that money into furthering technology can help us explore those places, and would be beneficial for all of us. I'm sure I could come up with a lot of other things to change or do with the world, but these would be the things I would do. This is a totally hypothetical situation, and there's probably never going to be a leader of the world, but if there were one, and if I happened to be chosen for it, this is what I would do.