Truth Doesn't Evolve

No value is true today that wasn't true one thousand years ago. It's wrong to murder now, and nothing about the way the universe progresses can make murder right. If enslaving a man for the color of his skin is wrong today, then it was wrong 200 years ago and will be just as wrong 200 years from now.

True ideas originate from a different place than culture, so they are independent of fashion, history or evolution. Aristotle's Law of Non Contradiction (A cannot be both A and not A at the same time and in the same way) wasn't invented by Aristotle, it was revealed by him. We were operating under the Law of Non Contradiction and will always operate under this law, because like all true things, it wasn't created by culture.

If anything, almost every true thing that has ever existed was campaigned against by various cultures throughout man's history. Different cultures have believed that man can be enslaved because of the color of their skin or that Jews were the source of the world's problems or that a child should be sacrificed to ward off evil spirits.

This is why I shrug when culture is at odds with some of my values. Given culture's terrible track record at getting things right I should hope it opposes at least some of my values.

There is no attribute of culture that can keep it from changing while there is no attribute of the truth that can move it one way or another. You can't improve on a true ideal.