The global economy is chugging along "at or near its best" right now. But the longer term "looks scary," writes Ray Dalio, founder, chairman and chief investment officer of Bridgewater Associates, one of the largest hedge funds in the world.He's fretted in the past over the potential for social upheaval caused by national financial policies and economic disruption. In his latest article, Dalio argues that while the outlook for both the U.S. and other economies "looks good for the next year or two," he sees storm clouds on the horizon."We have a lot of debt and a lot of non-debt...