《公羊传》开宗明义提出“大一统”之说,这种学说在该书中占据着首要的地位。虽然在民族问题上表达了“内其国而外诸夏”、“内诸夏而外夷狄”的思想,但是区分“诸夏”与“夷狄”的标准则是文明和道德进化的程度而不是种族,并且“诸夏”与“夷狄”是可以相互转化的。换句话说, The introduction of the “Rams Biography” put forth the concept of “unification of the country,” and this doctrine occupies a primary place in the book. Although the ideas of “within the country and beyond” and “inside the country and outside the country” were expressed on the ethnic issue, the criterion for distinguishing “all summer” from “barbarian” is the degree of civilization and moral evolution rather than Race, and “Zhu Xia” and “barbarians” can be transformed into each other. in other words,