"Somewhere else,it is estimated that it takes three generations to change a way of common thinking."
Common thinking arises from the way new people are raised/taught.
So, it might take less, given that there is a need for new safety culture.
The need that is felt by instructors as well as airlines personnel(responsible for safety) including top level managers.
It is saddening that so much has been learnt in aviation about safety, yet, while reading what some russian pilots on various forums have to say about that "damn western airmanship culture that no one needs", I am left to wonder, what century they are flying in ...