What are the marks of a sick culture?
It is a bad sign when the people of a country stop identifying themselves with the country and start identifying with a group. A racial group. Or a religion. Or a language. Anything, as long as it isn't the whole population.
A very bad sign. Particularism. It was once considered a Spanish vice but any country can fall sick with it. Dominance of males over females seems to be one of the symptoms.
Before a revolution can take place, the population must lose faith in both the police and the courts.
High taxation is important and so is inflation of the currency and the ratio of the productive to those on the public payroll. But that's old hat; everybody knows that a country is on the skids when its income