Why Societies Collapse - college - the rapid simplification of society

This is a 7 part series - the link is 1 of 7.
If you need to bone up on why societies collapse this is an accredited course on the subject. I thought I knew
a thing or two - but this presentation has tossed a few more logs on the fire - I was not aware of - as well, as more thoughts on the subject, it goes into systems and how to identify the complexity of the subject.