Can one really apply the lessons of history and of the past to the present and the future, as a way to get what they want out of life? By deeply understanding cause-effect relationships -- clearly expressed, shared with others, overlaid with data, back-tested, modified -- you can build a set of principles/algorithms/recipes for dealing with the realities of your life, observes Ray Dalio in this episode of the a16z Podcast (in conversation with a16z general partner Alex Rampell and Sonal Chokshi). Dalio's book Principles: Life and Work originated as an internal company document that was posted online years ago and has been shared widely since; he is the founder, chairman, and co-chief investment officer of Bridgewater Associates -- one of the top five private companies in the U.S., which manages over $150 billion and has made more money for clients than any other hedge fund.