Societies evolve. Faster than you may like, however there's only one organising principle in the world: change.
Hmmm.....the same had been teached in GDR schools....that socialism is the future.....the progressive change which will undoubtly leave everything old, namely capitalism, behind....
You know? That was wrong....utterly, utterly wrong!
Not all and every change is good and acceptable....the vision that the youth will get used to it and every "old" thing will automatically die out is one of the most beloved errors of the global left!
Humans just don't work that way!!! When you can't get the majority behind you, you will lose...or you will need to build a dictatorship and rule your change with fear and death but then you will lose only abit later...
One could think they had learned from the failures of the recent past....but no!