Aww, happy to oblige : )

I am of the opinion that any generation is better than this one, so to live in the 70's and let others experience it too doesn't bother me :)

In any case, being as you're apparently trying to get me to see something about linguistic diversity, but when someone provides a link in which the meaning isn't immediately obvious withouth giving any indication to what part of the link they are referencing, I tend to lose interest.
(Please have some courtesy, I wouldn't do that to you.)

But as per linguistic diversity, I think it bears simply mentioning that one* reason commonly givine as to how China remained somewhat unified, despite civil wars and other things that would usually tear a country apart, was the common language.
It's true that there are many dailects in Chinese, but none of them would be unintelligible to a native speaker and in written form all dialects look alike (except of course for simplified and traditional, but those are both learned usually).

Lesson from China whose civilisation goes back at least 3000 years, commonality of language tends to unify.
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*I stress the "one" here because I'm fairly certain that you might have your own ideas why China has remained generally unified, but I will maintain that the major factor that contributed to that unification was the common use of Chinese language.