“Despite extraordinary changes in the economic, social, and political environment over the past two centuries, stocks have yielded between 6.6 and 7.2 percent per year after inflation in all major subperiods. The wiggles on the stock return line represent the bull and bear markets that equities have suffered throughout history. The long-term perspective radically changes one’s view of the risk of stocks. The short-term fluctuations in market, which loom so large to investors, have little to do with the long-term accumulation of wealth.”