No, they simply don't base their ethical views on theistic ideas. That doesn't mean that they are necessarily atheists, though certainly some are. They could be Deists, just for instance.
I did say "generally."
And you may claim all you like that this could never have happened.
And I would be right. Because as I've already noted, the Judeo-Christian ethic is now at least 2,000 years old and has been spread around the globe; its presence and influence is ubiquitous. Widows in India, for example, are no longer subject to Hindu Sati and thus made to self-immolate on the funereal pyres of their deceased husbands, and this is because of Christianity. There is no longer slave-trading, or ritual human sacrifice in all the various parts of the world, because of the spread of the Christian gospel. It was Christianity that led to the abolition of slavery in the West (and by extension, virtually everywhere else), not once, but twice! Indeed, slavery had been all but completely abolished in the Christian West during the Middle Ages, and it was only with the Renaissance and the subsequent Enlightenment, with its emphasis on a return to Classical thinking, that slavery was ever re-introduced into the West -- and in a far more egregious form than had existed in the Classical world.
It was only the Christian West that saw the formulation of knightly chivalric codes (along with 'Just War' theory), and of courtly love practices that regarded women as persons to be wooed rather than as merely objects to be taken and impregnated. It's not by accident that was only in the Christian West that feminist movements flourished and that women enjoy anything close to equality with men.
After suffering various stillbirths previously in other parts of the world, it was only in the Christian West that science not only survived but then thrived: where astrology grew into astronomy, alchemy developed into chemistry, and mathematics became the language of science by which we discover, understand, and measure the cosmos.
Suffice to say, I could on and on.
You are conjecturing as well.
No, my friend, I'm not. For the exact reasons I explicate above.
I'm sorry to inform you that this is true for the history of Judeo-Christian morality as well.
Come now, Mark. Are infants -- most often the female babies -- regularly left exposed on trash heaps and thus left to the tender mercies of the vermin and other scavengers that typically feed in such places? Similarly, are the elderly turned out of their homes and left to wander till they also die of exposure? These were common practices in the Greco-Roman world and in each case it was Christians that deliberately searched the garbage dumps and the wildernesses outside their cities in order to find and take in these infants and elderly to care for them.
Are women forbidden to speak in public to any males they're not related to except through a male with whom they are somehow embedded, like a father, husband, or even a son -- and without whom they are left completely voiceless (such as was the case with childless widows)? Wherever they are not so forbidden, it is in large part owing to Christianity and its influence.
Is it still the case that it's considered perfectly acceptable that the poor are more severely punished than are the wealthy, even if they're both guilty of the exact same crime? It was only with the propagation of the uniquely biblical teaching that ALL humanity is created in the image of God, whether rich or poor, male or female, Jew or Gentile, that in those nations that share a significant Christian heritage -- or have been sufficiently Westernized -- where all are regarded as equal under the law.
Again, suffice to say, I could go on and on.
Ah, and they ALSO share a significant influence from Hellenistic and Roman philosophy. It's not like modern "Christian" societies are only influenced by Christianity, as if this exists in a vacuum.
eudaimonia,
Mark