So you think that your "culture" has the exact same morals as those that your grandparents and great grandparents had?
Also, the discussion is about morals, not principles. they are not one in the same.
Once again, we are both in the same culture unless you are not an American.
Understanding that morals evolvoe over time does not make one "easily influenced by the latest fad"
At one time it was moral in this country to own another human being. It no longer is, unless perhaps you think ityes is still moral to own another human being.