I don’t think a sense of right and wrong depends upon a belief in God, however, I do suspect that without God as the ground of morality it is difficult to justify moral principles as obligatory.
Obligatory is an interesting word. Given that Catholics believe in free will, obligatory can only have a relative meaning – namely, obligatory in the sense that it is demanded, and that any failure to fulfill those obligations will be punished.
But
not obligatory in the sense that you are are not free to disobey. You are perfectly free to disobey, but will have to face the consequences of doing so.
that moral principles direct or oversee behaviour and behaviours typically come about, where humans are concerned, as a result of reason and motive, a purely atheistic view of the world provides neither good reasons nor the motivating impulse to act morally.
Provides neither good reasons, nor the motivating impulse – how does one define this? If atheists disagree with you about the motivating impulse, are they mistaken? A motivation is a subjective experience.
An atheist may not torture animals because he has no desire to torture animals. Yes, he
could torture animals – or people – if he wanted to, but he doesn’t want to.
I think these metaphysical arguments get too hung up on the, “but you still could, if you wanted to!” You could virtually
anything, if you wanted to – including in a universe created by God.
I think it’s just as pragmatic as that. Most of us do not struggle with the overwhelming compulsion to murder. It’s not clear that the desire to kill others is a great, innate compulsion in a human being, as a general rule. Most of us who are
socialized are bred towards empathy – and a days-old infant is capable of forming bonds with other human beings, starting with its mother.
Why do humans care about each other? Why does the family exist? Why do friendships exist? Societies? Why is the human being, as Aristotle observed, a social animal? It is, apparently, in our nature as a species, necessary to our survival and flourishing. And we recognize that – in a God-fearing society and in a non-God-fearing society – there will
always be those who want to murder (for example), and who do.
Even a God-fearing Christian can – for example – turn psychotic and kill someone, whom he thinks he possessed by the devil. So we lock that person up, for the safety of others.
I know that “metaphysical need” – the need to ground human values in something that transcends humanity is very intense, with those who are religious. And it irks them that secular humanists, at best, recognize that their arguments begin and end with pragmatism and human experience – falling short of metaphysics. As they see it, though – and I agree with them – metaphysics is ultimately speculative in nature, not certain knowledge.
I also submit that our sense of right and wrong is grounded pragmatically – the way we came to discover it. That is, though we ground “do not steal” or “do not kill” either as a God-given command
or as something innate, the most obvious reason it is prohibited, as a rule, is that a society cannot function peacefully if these behaviors are permitted.
Hitler, Stalin, Mussolini, were experiments – experiments that failed. They led only to impoverishment, violence, and the self-destruction of a culture. They were tried and found deficient – proven to be poisons to any society that values life and flourishing.
And, rightly or wrongly – with metaphysical sanction, or not – most people do value life and human flourishing.