Much of this is discussed in Diamond's Collapse for those who read it. It's an interesting summation of what could lead to the collapse of Western Civ - and it looks at economic issues which Diamond didn't do as I recall.
http://www.bbc.com/future/story/20170418-how-western-civilisation-could-collapse
http://www.bbc.com/future/story/20170418-how-western-civilisation-could-collapse