While I agree the rate of change isn't uniform up until a rapid change, I wouldn't say stagnation. Conformity or stability I like better

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And even Russia. Would you characterize that sort of change as natural and typical? I'd say that they were indeed falling behind the world, and knew it. They even saw Japan confronted with superior technology from an industrial nation, and those in power took drastic measures.
Measures that in no way even gave a second thought to preserving the old culture. Any culture not hard and fast in line with the government's views was squashed, and with it many ideas and views. They financed their rapid development with the blood of their own people for a hastened transition; the people of Russia still feel a scar from that wound today on a national and individual level. Whether they were right or wrong to do so seems to be as controversial as communism itself, or at least in circles I hear from.
Aside, I do agree a cyclitic change does appeal more to me, and I have been toying with the idea. I simply don't know where to start looking.