translation.en: What it means to put it mathematically is that, if you're concerned about a society today, you should be looking not at the value of the mathematical function -- the wealth itself -- but you should be looking at the first derivative and the second derivatives of the function. That's one general theme. A second general theme is that there are many, often subtle environmental factors that make some societies more fragile than others. Many of those factors
translation.zh: 这个现象用数学思维可以这样理解：如果你要考虑一个当今的社会， 你最该关心的并不应该是这个数学函数的值， 具体而言，即一个社会的GDP；你应该留意的， 应该是这个函数的一阶导以及二阶导。 以上便是得到的崩溃社会的共性之一。其二， 总是会有许多微妙的环境因素使得 一些社会较之其他更为脆弱，而这些环境因素