So if you look at this, these are the best estimates we have of world GDP growth and rate of return on capital, average rates of return on capital, so you can see that during most of the history of mankind, the growth rate was very small, much lower than the rate of return, and then during the 20th century, it is really the population growth, very high in the postwar period,
仔细审视， 我们得到的最佳估计是 世界GDP增长 和资本回报率 平均资本回报率， 您可以看到 人类历史大部分时间 增长率非常小 低于回报率， 在20世纪 战后 人口快速增长