The lack of a common morality is the death rattle of civilization.

I say this as a Christian.

In my view, Christianity in the US was once nearly ubiquitous, and therefore acted as a (relatively) unifying common morality.

There were still shitty people, atheists, bad Christians, and nonconformists, but there was no real counter-narrative to living according to the Golden Rule and 10 Commandments.

As we decend into multicultural tribalism, and move away from social homogeneity, it's difficult to get society to agree the most basic concepts of what is universally right or wrong.

Worse, within our tribes, we can agree on a common morality, but all bets are off for the tribe competing with us.

To be clear, I'm not talking about racial homogeneity, I'm talking about cultural. That's the real damage of multiculturalism is that we can't even agree on what it means to be American anymore.