Im a very optimistic person, but you cant be blinded by optimism, and put reality aside, so i can answer this by making everyone on earth follow the same beliefs, the same religion, and have the same ammount money, so basically, everyone must be equal, so people shouldnt feel lower, or higher than others in any way, but this is life, you have your rich, your poor, your good and evil, your king and soldier, so since our life is the way it is, and it will never change, we cant have peace, so just be kind to whoever is around you, thats enough.