Ray Dalio runs Bridgewater Associates, a very large and successful hedge fund. He is one of the most respected practitioners of his craft in the world. His 30 minute video above on how the economy works, which is currently doing the rounds, is well worth taking the time to watch by any student of economics. (The paper may be found here).
“All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake up in the day to find it was vanity, but the dreamers of the day are dangerous men, for they may act their dreams with open eyes, to make it possible." T.E. Lawrence; Seven Pillars of Wisdom