If you have a moral, that's basically you imposing your subjective reality onto an objective world. Other human beings, in spite of having subjective perception, are objectively existing beings. Every human being's thoughts objectively exist, and a moral is a command of someone else to change the nature of their reality (which is to say the nature of their being). Since each person can have a different view of what reality is, each person can have a different view of what morality is. Since everyone can have a different view of what morality is, there's no way to say that there's an objectively true morality. Furthermore, the objective reality that exists outside of our heads obviously doesn't care about whether or not we're moral, because it created a world which is profoundly uncaring about our survival. It created a world where animals are basically in a food chain to survive; there is obviously no morality built into the world.
