自新中国建立至七十年代末，在史学界，基本上是抱着为现实政治服务的目的研究阶级关系，强调阶级斗争，很少有人从学术的角度去客观地探讨阶级关系的构成与变化。而且，不论是阐述历史上各王朝的阶级成份，还是研究当时的社会阶级状况，多笼统地把夏商以来每一历史时期的... Since the founding of new China to the late 1970s, historians have basically studied class relations for the purpose of serving real-life politics and emphasized class struggle. Few people have objectively explored the composition and changes of class relations from an academic point of view . Moreover, whether it is to explain the class composition of various dynasties in history or to study the social class situation at that time, it is more general to put every historical period since the Xia and Shang Dynasties ...