The last period of titanomachy and ideological turmoil similar to present issues in the West was following the French Revolution, roughly two centuries ago. If it took that long to come full circle, it will take at least as long for culture to drift away and break the cycle.

Of course all of this is assuming Eastern culture does not become globally dominant. I consider it unlikely…I suspect for a while yet each great region will continue within the dialectic of its own culture.