[B] It is so inverse to what theists contend that we atheists live off their morality as it is that when they use reason and facts they live off our humanist morality. We make this covenant morality for humanity to reflect the consequences of actions for good or bad on humans , other animals and the environment rather than what some pathological men of yore made up from their whims and tastes.- a simple subjectivism. It is objective for we all can see the consequences, which are its ground. Like science, it is provisional and debatable as shown by moral progress, and as different individuals do see those consequences differently. Yes, that progress as we are more moral than those of the ages of faith!
As Plato's Euthyphro notes morality needs no God to ground it.
How do you ground your morality? Is it the divine command theory or the new divine command theory? Are you a theist who accepts Plato's contention but think that He adds force to morality? Perhaps, you follow Bishop Spong in accepting humanist morality.
I find morality to be universal in that all follow the virtues, and that it includes self- and other interest as opposed to egoism [ not egotism where one rides over others].
It is our evolved moral sense of empathy and other matters that we refine to include all humanity.Yes, evolution provided for morality rather than making for dog eat dog of Spencer-Randism [ so-called Social Darwinism, such a slur!]. Nay, the survival of the fittest doesn't mean combat but only whose gene pool goes the next round. So, creationists err in finding evolution a threat to morality. Some humanists have erred in finding morality in evolution as distinct from its making us moral beings
This presumption would make the world better!