We can, but if we do it without any historical context, then it will mean that basically everyone who ever lived in the past was immoral (and it will most likel

We can, but if we do it without any historical context, then it will mean that basically everyone who ever lived in the past was immoral (and it will most likely also mean that we'll all be considered very immoral by people in the future), and I can't see that being a particularly useful point of view.