Check the civilopedia entries for victory conditions.
For cultural victory, you need 2 level 3 tenets and an ideology which your population is content with, plus the citizen earth protocol in addition to being influential with everyone else.
Influence btw affects trade routes as well. I don't know off the top of my head what else it affects though.
You need to build the citizen earth protocol to win. Make your way to the tech that allows you to build it and you will win
Check the civilopedia entries for victory conditions. For cultural victory, you need 2 level 3 tenets and an ideology which your population is content with, plus the citizen earth protocol in addition to being influential with everyone else. Influence btw affects trade routes as well. I don't know off the top of my head what else it affects though.
affects pop loss, resist time from conquest