Tainter deals directly with the Roman Empire, but the nutshell is the cost of complexity begins to outweigh its returns, requiring more and more resources just to maintain the status quo, until the entire thing becomes weak and susceptible to failures large and small.
- "Panarchy: Understanding Human and Natural Systems" (Amazon link: https://www.amazon.com/Panarchy-Understanding-Transformation...) is also a fantastic book drawing from ecosystem science and proposes a general model for this. It's pretty well accepted in ecological circles but has been criticised for a lack of empirical data. The general model is the same as Tainter's though.