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Turnover of IBM (2015) ($92.8billion) is 4 x GDP in Benin (2015) (23.12 billion USD p/a)
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Duration of Pandyan Empire (South India) (1,850 y)
If this was a standard unit ...
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.