Advance
Free Merchants
In more reactionary and hidebound societies, merchants are looked down upon as somehow being less than those who own land. Well, this foolish attitude is not for us; we know that wealth is power regardless of where it comes from.
RepublicGovernment TypegovernmentAdvance tree
It has no requires, so the game files don’t say where this goes. When the game builds the 
Discovery tree, it adds this at the end of a branch with room for it, in the same spot in every campaign.
