I think you have missed the most alarming symptom of all. This one I shall tell you. But go back and search for it. Examine it. Sick cultures show a complex of symptoms as you have named... But a dying culture invariably exhibits personal rudeness. Bad manners. Lack of consideration for others in minor matters. A loss of politeness, of gentle manners, is more significant than a riot.
This symptom is especially serious in that an individual displaying it never thinks of it as a sign of ill health but as proof of his/her strength. Look for it.
--- a conversation with Friday and Dr. Baldwin in "Friday" by Robert H. Heinlein