The essay sorts through relevant positions of major schools of interventionism and liberalism to reveal the joint support of various schools for social security system.

From the global point of view, interventionism rises, as an important means of government intervention, planning has been even thought much of and has formed an inner-relating planning system; from the domestic point of view, the questions that whether there has been a planning system or not in the past 50 years or so and what planning system should be set up at present deserves our attentions.

In the framework of G function analysis,the result from the investigation of modern economics reveals that the core thoughts that support the theories of modern economics are government interference theory,new liberalism and innovation theory.

Western social security theories are classified into three schools in this paper, namely, the state interventionismm, the economic liberalism, the middle way genre.

Furthermore, it put forward what the trend of liberal economics and state interventionism enlightens the government behavior in higher education reform: What the government needs is not to cut off government, but to transform the method of governing.

The United Nations and Humanitarian Intervention after the Cold War;