Moralities based on religion, "inherent respect", etc. are ad hoc. They are unreasonable moral codes.
calling a morality ad hoc says nothing of its truth value. It's basically an ad hominem, but aimed at the idea itself.
What I claim to be the purpose of morality has a clear observable behind it, and this observable gives a reason to label something as "right" or "wrong" (in the form of fair or unfair). It cannot be accepted as a truth in the way the speed of light can,
I don't see why we should take your definition of the purpose of morality to be truth. how do you know the purpose of morality? how do we even know morality has a purpose?
but if one were to accept my definition of morality, the system derived from this purpose must also be accepted.
I fixed this statement for you in order to make it logically consistent, otherwise you have yet to show us how the original conclusion logically follows from the original premise.
so you're arguing for a god-given standard of absolute morality?
nope. As a Christian, I
believe in an absolute moral standard, but that's not part of the argument I'm making in the OP. My argument centers around atheism as a belief and what logically follows, and what doesn't follow from that belief.
well then how do you account for changes in culture over the centuries that have affected morality? How do you account for different civilizations having different codes of ethics?
those have absolutely no bearing on whether or not there is absolute good or evil. As an analogy, people not believing that e=mc^2 or changing their beliefs about it doesn't make it any less true.
another example: If I have a vault which may or may not have something inside, people's changing beliefs on the matter would have no effect on whether or not there was actually something inside the vault.
In the OP, you're right that atheists have no reason to believe in an ABSOLUTE good because there is no such thing. Good and bad are relative words with standards set over several millennia of cultural and technological development.
you're right that words and their meanings are made and defined by people based on the historical context in which those people lived. I'm not talking about words. I'm talking about ideas. The
idea that I'm talking about is the idea that there is an absolute moral standard.
Theists may believe in an absolute standard, perhaps the myriad of rules set forth in the Bible, but ask yourself how much of the laws stated in the Bible are relevant in today's society.
again this has nothing to do with whether or not such an absolute standard exists or not.
Before you respond, note that there is a difference between an eternal absolute good/bad and a good/bad set forth by the human tendency to sympathize (the origin of the Golden Rule). For example, I imagine the rule that killing is wrong to be human nature because we tend to sympathize with those we interact with. Thus serial killers who do not sympathize with their victims do not feel anything wrong when they murder another being. Slave-owners don't feel bad after starving and beating their slaves to death either because they do not sympathize with the slaves, as they are not seen as human. Therefore it can be said that even "thou shalt not kill" is not really an absolute moral either.
thou shalt not kill is a commandment based on a moral principle, namely that killing is wrong ( btw there is debate on whether it should be translate "kill" or "murder", but that's another topic). I don't see how people's emotions during the act of killing affect the moral principle's truth value, at least unless you introduce other principles into the mix.
There is no reason to believe it exists unless you believe in God.
hey what a coincidence, that's exactly what I argue in my OP! so we agree!
Really this debate is just another veiled "do you believe in God" debate.
not at all. as evidenced by your agreement with my OP, we don't have to agree on the issue of the existence of God in order to agree on my argument.