I have being playing for 8+ years and so I have experienced this so many times.
Every time we become inactive for some reason (you know people have stuff to do) and come online again, we have to collect cultural treaties all over again.
So I was thinking, can we implement some kind of a mechanism to have those cultural treaties preserved in some form?
Kind of like another type of resource that we obtain from inactive user(s) when we attack and pillage them.
Just thinking out aloud, apologies if this sounds stupid