Morality can be both transcendent as well as adaptive, or somewhat experimental. Laws are partly a reflection of an age and a manner world view, but such often are a valid adaptation of laws of a transcendent source, while sometimes being a rejection of such in social experimentation.
But as for the Bible, some laws therein are indeed culturally applied, and others ceremonial, but its basic *moral* laws are universally applicable, and have indeed remained unchanged. See http://homosexvsthebible.wikia.com/wiki/Leviticus_18
And moral laws in America overall have historically had a strong derivative foundation therein. What is a matter of social consensus is whether, or to what degree, a society will assent to such, including by adaptation.
For effects of the ever-morphing morality of liberalism’s rebellion against basic Christian morality, see, http://peacebyjesus.witnesstoday.org/RevealingStatistics.html
They are not universally applicable except among groups, not even nations, where such laws are rigorously applied. We don't stone adulterers, we don't kill disrespectful children, etc.
The Ten Commandments are basic human tenets that were seen as harmful for the society. Except for the first one, which is entirely cultural, the rest of the universal moral laws are found in most if not all cultures and are not tied to any particular God, but rather to basic human nature.
And moral laws in America overall have historically had a strong derivative foundation therein. What is a matter of social consensus is whether, or to what degree, a society will assent to such, including by adaptation.
In other words, morality is a current practical relative application of the universal principles. Nothing absolute about them. In fact, in our society it is not against the law the covet one's wife. It's not a felony to commit adultery; it's not even a misdemeanor. It may be good grounds for a divorce, but you don't go to jail or get a ticket for cheating on your spouse. Not even in Israel. Only in strict Islamic countries they still stone to death—and everyone thinks it's barbaric!
Well, yeah, it is and it was barbaric in biblical times too! Bottom line is: morality is a social agreed-upon standard.