I've always found Ray Dalio's vision of the economy and the "economic machine" fascinating. Here's a video explaining How the Economy Works
He's just penned a piece in the Financial Times arguing we're at the peak of a long-term debt cycle. Downside risks to asset prices and demand currently outweigh upside risks, which means the Fed should be careful when raising interest rates. As Dalio puts it, central bankers should "err on the side of waiting until they see the whites of the eyes of inflation before tightening."
Remains to be seen if the Federal Reserve will heed his advice this coming year.