Yeah, ain't that a shame? Those old belle-epoque people getting older, while the younger generations embraced Word War I and then the Nazi party.

Or those people that got older after the sixties, were the younger generations embraced Raeganism...

Sarcasm aside, new is not necessarily better. It's not even a strong correlation. There is new stuff that can be better than old, and old stuff that can be better than new in equal measure.

Only technology monotonically progresses to better and more advanced things. Morals and customs (and aesthetics) can and do change either way.