Decay, decadence, unhappiness, these things happen naturally, to try to rid society completely of these things is unnatural. We need to try to save what is healthy and evolutionary, that is the realistic task.
Looking to deeper causes we find that nature and evolution use happiness and unhappiness as a means to encourage survival and reproductive success, just as good tasting food encourages you to eat, not for the sake of the good taste of the food but for the sake of survival.
Deeper still I believe is the material Spirit-Will To Godhood which activates all life, all happiness, unhappiness, even all survival and reproductive success to evolve toward Godhood, and it works along with the outside forces of evolution and natural selection.
Getting this hierarchy of means and ends right is the religious, artistic, philosophical, political and scientific sacred task.