History, in the eyes of legendary investor Ray Dalio, is a perpetual motion machine. Nations rise and fall according to an inevitable cycle where peace and prosperity are always followed by depression and war. And in his new book, “Principles for Dealing with the Changing World Order,” Ray says the United States is now in the downward part of that cycle.

Next Big Idea Club: Get 20% off an express membership when you use the code PODCAST20 at www.nextbigideaclub.com