At such a high concordance as to see ideologies disappear from the population? Or is it more likely that ideologies and people's beliefs are from social and environmental feedback?

The point isn't where you learn about an ideology, it's that they die off just as easily as genes do when they are outcompeted. Do you know anyone that claims to be a Physiocracist? Or even a much more famous example in the Spartan political order which disappeared with their nation.