What are some words that describe precisely, something that is is not structured, ordered and not a system. However the word I'm looking for is not something like anarchy, I want a more neutral sounding word with no real negative slant/connotations to it.
There is a certain word that I've seen before that I'm looking for, however I can't find it, even after trying numerous thesauruses, which is weird because it's not a very complex word, it's just a bit uncommon.
An example of usage would be:
Rules do not work in a world that is ___. Nature is not an organised system it is ___.