I don't buy into this principle. There are cycles everywhere. It's interesting to discuss why they happen but things don't just fall apart because everything is garbage. That's too negative.
Look at democracy - it has had its ups and downs over centuries. Don't look for any easy answers... unless it's in McLuhan 
I think you need to look a bit closer at democracy. The democratic revolutions are little more than 200 years old. You’re sadly mistaken if you think it’s historically durable.