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经济学上有个说法：构成集体的每个个体的理性选择叠加起来有可能成为集体的非理性行为。这里可以举一个例子来说明这条有点拗口的理论：每个粮食生产者用加施农药和化肥的方法提高粮食产量,因此整个社会的粮食总产量得到了大幅度增长,相关农药化肥的厂商也焕发出了活力,整个社会的经济总量得到了大幅提高。但是,由于粮食的品质下降了,整个社会的健康水平也下降了。
In economics, there is a saying that the superposition of rational choices for each individual that constitutes a collective may become a collective irrational behavior. Here is an example to illustrate this somewhat unkind theory: Each grain producer uses pesticides and chemical fertilizers to increase grain production. As a result, the total grain output of the entire society has increased substantially. The manufacturers of related pesticides and fertilizers are also Rejuvenated, the overall economic output of the society has been greatly improved. However, due to the decline in the quality of food, the health of the entire society has also declined.