Absolute merely means universal, objective, essential when applied to truth in general. When applied to morals, it also means transcendant, eternal. Something does not "become" a moral absolute. Moral absolutes are not invented, they are discovered or discerned. Morality is not doing what I like, but doing what is right. Moral relativism is simply morals based on human preferences and this is the dominant system in the world. For example, the U.N. is constantly talking aobut human rights, but where do these U.N. human rights come from? The come from the men at the U.N., that's where. The men at the U.N. have appointed themselves are the ultimate moral arbiters, but it's a joke because the U.N. has no moral authority beyond themselves.