I would create a very realistic world, but with all the species changed, I would like to see how everything would have gone without the animals, species, and plants. How everything would have evolved. Know if the earth would still exist. Or not. Know if there would be animals, food, know the temperature that would be, etc. I was going to say that I would set up a society without problems, but even in an invented world that is impossible, even if you invent a society there will always be bad people. In my world it would be all dark, since I want to see refined in my own world the way we are going to end up on earth, all contaminated. People would move walking. I think that when I put the characters, everything will go much better than it is now.
