Democracy means not only the check on and balance of public authorities such as legislative power, judicial power and administrative power, but the check on powers by pluralistic society.

However,with the immigrants pouring into the country and the emerging of black people s communities,American society gradually turned towards a pluralistic society and formed the pluralistic evo.

In the post-cold war era,the Socialist Party working on the new features of the society set up some theoretical program,rearranged the policy,stressed the inclusion of the pluralistic society,the positivity of the risk society and the participation of the society.

In the diversified society,the school moral education is faced with greater challenges than ever.

The system of Traditional value and moral education are faced with unprecedented challenges, and the multiple pursuit of value makes the moral education increasingly difficult to carry out, and how will the moral education in multiple society be carried out

Analysis of social relationship construction between firms in cluster based on repeat game;

The review and prospect of knowledge transfer based on social relation;

The Role of Non-government Organization in the Reconstruction of Social Relation;