The first is the relentless human tendency to classify the world as "us" versus "them," and then to reduce "them" to sub-human status. Such classifications probably evolved because they strengthened the cohesion of the "in" group, facilitating cooperation by harnessing hatred for those outside.
堕入野蛮似乎有两个共同特征。首先是人们冷酷无情地将世界划分为"我们"和"他们"，再将"他们"降格到非人类状态。这种区别的形成可能由于他们增强了组织"内部"的凝聚力，培植对外仇恨借以促进内部团结。