社会分层理论有三种主要模式，即功能主义理论、冲突主义理论、协调论。
There are three kinds of main pattern theory of the social stratification: functionalism theory, conflict theory and coordination theory.
社会冲突存在于每一个社会中，辩证地认识社会冲突的功能具有重要的理论意义和实践意义。
Social conflict exists in every society. A dialectic recognition of its functions is of great theoretical and practical significance.
而角色理论则表明，组织中相互重叠的角色系统导致的角色功能的模糊不清，是引发部门间冲突的根本原因。
From role set theory, the system of overlapping role sets in the organization is the main reason causing intergroup conflict.
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