Watch the following video discussing the macroeconomy:

http://www.economicprinciples.org

Ray Dalio, Founder of Bridgewater Associates (One of the biggest Hedge Funds), shows the basic driving forces behind the economy, and explains why economic cycles occur by breaking down concepts such as credit, interest rates, leveraging and deleveraging.

What is he potentially missing? How should he account for it? How could we expand his video?