If you let things go, they return to the wild. If societies do not find a way to order themselves toward producing the good man, they naturally and more quickly than is supposed return to the barbaric.
It is every citizen’s duty to choose those leaders and representatives whose version of the good life does not issue in a new Dark Age. Orienting a society toward the end of flourishing is not sentimental work. It requires adult thinking and courage to make tough choices. Barbarism happens! But it only happens if virtuous citizens quit the work of pruning and shaping, feeding and harvesting.
Here is a video that touches on that theme.