Because sets of criteria can be thought of as being in layers. From a surface you dig down a little, but you can dig more, and more. The goal is to reach a limit.
Agreed. Please, among these historical agreements, demonstrate what objective reality was discovered.
"We hold these truths to be self-evident...". If you're not American and do not know this reference, google the American declaration of independence." That is a time in history when one group made a collective decision that appeals to any type of provable objective code.
Yes, they made an appeal but I asked for provable appeal. Historically, we have always made appeals to objective moral law, this doesn't mean they were successful. It also doesn't mean that the decisions made did not benefit for more social cohesion.
For an objective moral law, you first need to demonstrate that social cohesion is an objective "right" or desire.
It is my guess that most constitutions for government make such appeals. Certainly with respect to many civil movements in history, groups of people have made collective decisions that appeal to objective codes.
You're right, but this is because it's assumed that what people desire is social cohesion. It's convoluted to first consider whether the majority of people desire freedom from pain and misery.
Consulting the relativity of morality doesn't aid the emotive momentum of civil rights movements. People are happy to roll with the prerequisite that murder is "wrong"; Most don't question relativity.
Importantly, (and please acknowledge this point) there is no functionality to an objective morality, even if it exists; We are free to ignore it, should we
feel differently.
Some people would dictate that the bible objectively states that homosexuality is wrong. Even if they could (they can't) objectively demonstrate this, it doesn't benefit anyone; We can ignore it, save for the punishment of hellfire, should they be able to prove it (they can't).