Guys, I discovered that Great People costs scale up ccording to some unknown factor. There's a 'base price' for each Era to which a Great Person belongs, but it looks like as soon as the first Era's Persons are earned, the next Era's Persons price goes up from the base. As of yet I haven't been able to determine according to what. So, if someone figures it out, please edit the article!  Oh, and this doesn't seem to hold for art-related People. Soltan Gris 16:55, October 5, 2018 (UTC)

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