Quite so. The differences between 2000 and 1912 are hard to truely fathom. I don't know how you could possibly attempt to predict at that sort of timescale. Even a decade would be pushing it as far as I am concerned.
Why stop at the 19th century? It's not like the cost of transmitting information was less expensive before then, nor was it less centralized (people who had the resources/knowledge to propagate such information).
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