Nice little series! :) Read this piece, and will try to find some time to read your other articles in the series. Myself, I have also spent some time looking into collapsology. Mostly been focusing on historical analogies, such as the collapse of the Roman Republic (I think the Republic is much more relevant than the Empire in the current situation), and the civil strife that came with it. However, also been reading up on the environment, and all kinds of other stuff.