The society is inseparable from its dominant ideology or ideology mix

that's a bit absolute, i think. the politics of the leaders, yes pretty much, but the people not necessarily...

nazism was an exception, it's rare to have such a high percentage in lockstep. it never lasts either.

even as one ideology conditions society, (like now with neoconnery), there are growing numbers of people who question, subvert, and sketch out alternatives to such.

maybe your use of the word 'mix' in the last sentence tempers your meaning.

what i find interesting is the bedfellowing between apparently conflictual ideologies, (vatican/fascism, con/libdems, greens/polluters), as these call the supposed intellectual integrity into question, and often reveal them as just another wrapping for expedience.

potemkin powers, sharing agendas.

'The history of public debt is full of irony. It rarely follows our ideas of order and justice.' Thomas Piketty