The Evolution Course and Social Reasons of the Political History in the Western Han Dynasty

In the Western Han Dynasty,the political history had experienced several great changes. Liu Bang's political history was fuzzy and utilitarian,and he followed the Qin Dynasty's governance by virtue of water in the early Western Dan Dynasty. It was the virtue system of soil in the mid Western Han Dynasty. From the mid Western Han Dynasty,the political history became to the virtue system of fire. In the late Western Han Dynasty,Wang Mang made clever use of the change of the political history to set up a virtue system of soil. There were deep social reasons for the changes of the political history in the Western Han Dynasty.