Everything scales in layers. This includes civilization. The foundation for every civilization is the people's belief system. This is the first layer. Money and the monetary syatem is the next layer - I call it civilizations' cornerstone. If you fuck up these two basic layers you fuck up every layer that has been built on top of them.
Discussion
I'd argue the foundation for every civilization is farming...worrying about belief systems comes later and probably stems from ancestor worship.
Individual sovereignty + Hard money > everything else
Johan Huizinga argued that play predates culture and therefore is the foundation of civilization. I think they messed up play long ago.
He must have been a wise man
I'd probably slot Rules between those two