The purpose of this text is based on the central theory of constitutionalism to aim at the advocate of modern republicanism--Rousseau, to refute the theory of Social Contract and to prove that, it is mainly because of its four aspects of falsehood in logic structure, when modern republicanism doctrine used to design the theory of dualistic antagonistic state power to overthrow the theory of monism antagonistic state power in feudal era, that has caused many constitutional governments fail. Based on the pre-conclusions that the above-mentioned four falsehoods are good enough to compose the cause to breakdown or to fail contemporary democratic constitutional governments, and further on the basis of Liberalism and post-modernism, this text tries to propose a dialectical development plan for those constitutional governments, with theory of the modern antagonism national model.