Cohen,as the contemporary representative of Marxist analysis,had the responsibility to protect socialist for defending.He inherited the analysis of Analytical philosophy,by articulating an extensive critique of the right-wing Libertarianism Nozick's principle of justice and self-ownership,his argument structure riched in hierarchy,systematization and gave the Nozick's view the direct criticism.Concern associated with the reality for equity,justice and others have the important role of reference and inspiration,but also inspired us to further explore his theories.