Anyone can make a claim and define that as the objective foundation to morality. I don’t see how that makes their moral framework any more compelling or binding than one based on societal health and well-being.
That's because in order to say societal health and well-being is in fact
good you've assumed that there is an objective foundation to morality in order to call it good. Your determining what is good or bad is reasoning from a framework to weigh things as good or bad in. That reasoning of harm = bad (well-being = good) is
presupposing the truth of things that are unable to be substantiated in order to establish it as true. To put it simply, you need a reason as to why societal health and well-being is good and under an evolutionary paradigm you will only assume the truth of things in order to establish moral conclusions and continuously do so in an infinite regression. It's unavoidable within paradigms that deny the transcendent.
The reason for:
The claims of Christian Theism is that God is the source of all truth and why things are true at all, He is a being who's behaviour is subjective to Himself, He is sovereign, this is His Creation and therefore He sets the universal parameters of our behaviour. Elohim, The Source of all truth, allows inductive reasoning to have justification/reliability, moral claims to be facts, allows logic & reason to have a reason as to why they can be trusted or be reliable as apposed to "it's all we have" and allows for the real existence of laws of logic & mathematics and their correspondence to nature. It's not just God's standard for morality, it's God's standard for everything. He is the basis on which we are able to reason authoritatively at all.
The very nature of a correct or right moral stance means that the moral is true regardless of personal experience or interpretation, so any kind of relative or subjective morality is off the table if you want to say why your 'personal preferences' are authoritative in any way which is why it's self refuting if you want to say that certain moral actions are correct/right under subjective morality. Inherent value to human life doesn't exist independent of a transcendent source. Ergo The Being who created us determines what is right for His creation.
Is to show the incoherence of a worldview that is unable to justify the incontrovertible truths required in order to reach
any conclusion. When one worldview accounts for all of these things and Naturalism, Materialism and most forms of Empiricism all fall flat on the very reasoning required to establish them as true and NEED Christian presuppositions about reality in order to function, then why would you hold to it?
Let's use our friend Walking Contradiction as an example. Our friend Walking Contradiction called himself a "
Epistemological Solipsist": "
In epistemology, epistemological solipsism is the claim that one can only be sure of the existence of one's mind. The existence of other minds and the external world is not necessarily rejected but one can not be sure of its existence." (I hate quoting Wikipedia but it's a good jumping off point).
How can you be sure of the existence of your own mind? In order to say that your mind exists you need to presuppose the truth of logic and reason that allow you to come to the conclusion that your mind is the only one that you can be sure that exists. So now that has three things existing, the truth of logic reason, it's correspondence to reality around you which you can be sure of
and your mind. But do you see the problem? There's no justification for the authoritative use of the reason he's used to come to this conclusion and it makes his premise self-refuting and unable to be proven.
When he reasons for his position he presuppose the existence and truth of logical laws and also he presupposes that it's true that laws of logic correspond to existence around him in order to say
why his position is true. He is without any ability to provide a reason as to why they are true or why his use of reason & logic is authoritative to claim that it is in fact true he can only be sure of the existence of his own mind.
These very facts that are necessary/required in order to reach
any conclusion and have no justification to be found within the paradigms of Naturalism & Materialism, the very paradigms that makes evidence, evidence in a secular worldview.
So the "objective foundation for morality" is not just an objective foundation for morality, but an objective foundation for existence. Therefore morals are just like anything else and the truth of them & their justification comes from the same source that you allows you to reason inductively.
[Edit: Phrasing]