In 2011, the Association for Contemporary Korean History sent “A proposal for the revision of 2011 history education curriculum” to the ‘Research Committee for Policy-developing History Education Curriculum’, and “A tentative proposal for the revision of history education curriculums” to the National Institute of Korean History. It raised the issue of so-called “safeguarding the liberal democratic regime theory”, “building the nation in 1948 theory”, and “colonial modernization theory”. This paper clarifies that if these arguments are reflected in the Korean history education curriculum it will cause various confusion. This paper can be summarized into four points. First, the “Korean liberal democracy” was a result of the Cold War and has nothing to do with the real liberal democracy in western political terminology as it allows various restriction of individual freedom and reserves some key elements of the liberal democracy to eradicate communism and North Korea. Second, if one commemorates August 15th of 1948 as a Nation State Foundation Day, it nullifies the political legitimacy of the Korean Provisional Government which is clearly stated in the First Constitution. Third, the day of August 15th of 1948 is not a day of national foundation, but a day of the national division which divided the Korean Provisional Government established in 1919 into two national states from the ‘perspective of Korean nation people’ not from the perspective of ‘national history of the Republic of Korea’. Fourth, if one tries to reflect ‘colonial modernization theory’ or ‘implanted modernization theory’ into the history curriculum, one should revise overall current narrations of modern Korean history which have been based on the ‘independent modernization theory’ including the ‘immanent development theory’ or the ‘theory of the existing germ of capitalism’.