On occasion, Superman had come to grips with people, creatures, beings of one sort or another, whose motivation for pursuing evil purposes was, simply, to serve the forces of evil. This was a point of view Superman could not understand. He was convinced that all one needs to do to persuade someone to do what is right is to educate that person to the fact that it is in his interest to do what is right. There was a right and a wrong in the Universe and that distinction was not very difficult to make. If you litter the park, it will not be as clean next time you want to use it. If you hold up a driver when you are hitchhiking, there will be fewer people likely to give you a ride when you really need to get somewhere. If you pepper the atmosphere with radioactive waste, your children and grandchildren’s share of your legacy will be diminished. No one, Superman was convinced, would want to serve the cause of evil once he or she understood the meanings of right and wrong.
— Elliot S! Maggin, “Miracle Monday” (via chrishaley