The Church of Camwell will likely be accused of being relativist, but that could not be further from the truth. The Church of Camwell believes that Universal Truth exists.
Universal Truth is something that is true for all people, in all times, all places and all cultures. Part of the case for Universal Truth can be explained in this logically fallacious statement: there is no universal truth. Simply by uttering that phrase, you are admitting that there is a universal truth: that there is no universal truth. You then might say, "well that's the only Universal Truth that exists." Well, you're wrong by even saying that because that statement is another Universal Truth.
You basically state that there are infinite Universal Truths, because you say that there is no universal truth, and that is the only universal truth. But then you must say, "there are two universal truths: that there is no Universal Truth, and that is the only Universal Truth." But in that instance, you have three Universal Truths. Get it?
If you're a relativist, then just run through all of those logical loop holes. You would have to say that maybe universal truth exists in some places, but not in others. That's impossible, because a Universal Truth must exist in all places and times, or else it is not universal.
The positive basis for Universal Truth is the notion of reason. Reason is man's understanding of the world around him. The best way this can be demonstrated is by the concept of mathematics. We know that there are laws of nature, and mathematics conform to those laws. If an architect hopes to construct a structurally sound building that doesn't collapse, then the better hope that the math is done correctly. Mathematics is man's construct for understanding the laws of nature and existence, and our ability to use that to our advantage lets us know that there is Universal Truth.
The proof that mathematics is true is because we have been able to use it in the world. There are universal laws of physics and nature that apply everywhere, for everyone, and in every time.
Since there are Universal Truths in nature, it would stand to reason that there are also Universal Truths in morality. Just as there are laws of physics that reign true everywhere, there are laws of morality that govern the universe.
Let's take slavery for example. For a long time, humans justified slavery as a right of conquest. During the 18th and 19th Century, many Americans used the Bible to justify slavery. In fact, the bible does not condemn slavery while it outright condemns other institutions. This indicates either acceptance or indifference. However, we know that slavery is wrong. Slavery was never morally permissible, no matter how prevalent it once was. Just because slavery was a "reality of that time," doesn't make it any more morally permissible.
Slavery is wrong. It was wrong in 5,000 BC, it's wrong now, and it will be wrong in 3492 AD.
We know in our hearts that there are things that are immoral. Even psychopaths understand the concept of morality even though they are physically incapable of feeling guilt. It does not take a Bible or any other religious text to know what is morally good. All it takes is some rational thought. The one universal moral truth that all humans should agree on is that it is wrong to maliciously harm another sentient being.
The last thing we should mention about Universal Truth is the fact that we may never discover it in its fullness. The evolution of ideas constantly leads us to a more perfect understanding of Truth, but it is likely that humanity may never discover it in its entirety. The goal of every human should be to discover Truth in its fullness