What social policy reduces border growth via culture?

civilization-5 civilization-5-gods-and-kings civilization-5-brave-new-world

Solution 1:

This is probably a bug. It may be related to one of the following links. (Thanks @Jonathan Drapeau)

http://forums.civfanatics.com/showthread.php?t=465974 http://forums.civfanatics.com/showthread.php?t=465889

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