论门阀世族社会地位的演变

三国魏晋南北朝隋唐时期，门阀世族活跃在政治舞台上，门阀世族在东汉中叶已经把持垄断了仕途；曹魏时期创行的九品中正制保证了门阀世族的政治特权，有助于门阀世族的形成，东晋王朝以后直至南北朝前期，门阀世族及其统治达到了鼎盛，南朝后期，门阀制度走向衰落。隋唐时期，门阀世族的势力逐渐退出历史舞台。

On the Evolvement of the Social Status of the Family of Power

The family of power and influence was playing a very important role on the political stage during the periods of the Three Kingdoms,the Jin Dynasty,the Northern and Southern Dynasties and the Sui and Tang Dynasties. In the middle period of the Eastern Han Dynasty,the family of power and influence had monopolized the official career.The system of nine ranks established during Wei(220-265) ensured the political provileges and helped the formation of the family of power and influence.The family and its domination reached the prime from the Eastern Jin Dynasty through the early days of the Northern and Southern Dynasties.From the late days of the Southern Dynasty,the institution of the family waned in power.During the Sui and Tang Dynasty,the family of the power stepped down from the stage of history.