Modern Linguistic Constructivism, an important branch of Constructivism, mainly deals with the question of how speech acts construct social phenomena. Nichola Onuf stresses that speech acts lead to rules, rules then constitute institutions, and institutions in turn construct society. Friedric Kratochwil emphasizes that speech acts contain norms and these rules and norms have permeated the reality of social systems. Modernist Linguistic Constructivism not only enriches humanistic component of international studies, but it also greatly extends the field’s research scope. However, it studies language as an object of analysis rather than as the actual practice of speaker. This absence of “practicality”, which is the essence of language, has confined its usefulness to other issues related to language.