无论是动物界还是人类社会,都有这样一种现象:当种群或群体存在天敌或强大的竞争对手时,内部的争斗和分歧会相对减弱或缩小,凝聚力和团结合作精神会增强和提高;相反,当外部的压力或威胁减轻时,内部的稳定性和协调性下降,而纷争和冲突就会加剧,许多庞大动物种群或人类历史上建立的强大帝国由盛转衰的悲剧就是这样发生的。因此,人们很早就认识到,最危险的敌人不是来自系统的外部,而是来自系统的内 Both animals and human society have such a phenomenon: When there are natural enemies or powerful competitors in a population or a group, the internal battles and differences will be relatively weakened or reduced, and the cohesion and solidarity and cooperation spirit will be strengthened and enhanced; When external pressures or threats abate, internal stability and coordination will decline, and disputes and conflicts will intensify. The tragedy of a powerful and powerful empire built up in the history of many huge animal populations or in human history has thus occurred. Therefore, people have long realized that the most dangerous enemy is not from outside the system, but from inside the system.