The presence of several civs that have links with several other civs can help make the change more flexible as well as real.
Examples:
-Celts -> France/UK
-Byzantines -> Rome/Greece (antiquity) and Ottoman/Russia (modern)
-Mongols -> Russian/Qing/Mughals
What other "link civs" can you think of?
Examples:
-Celts -> France/UK
-Byzantines -> Rome/Greece (antiquity) and Ottoman/Russia (modern)
-Mongols -> Russian/Qing/Mughals
What other "link civs" can you think of?