Ray Dalio is the founder, co-Chief Investment Officer and co-Chairman of Bridgewater Associates, which is a global macro investment firm and is the world’s largest hedge fund. He's also the author of the #1 NYTimes Bestseller, Principles: Life and Work. He is known to have a very practical understanding of economics that is very different from conventional economic thinking that he spells out in his video series "How the Economic Machine Works".