Textbooks play a central role in Taiwanese education. In the wake of the political reform and social protest movements of the 1970s and 1980s that led to Taiwanese educational reform, critics assert that traditional textbooks reinforce the dominant national Chinese cultural identity without considering the specific perspectives and voices of different gender, cultural, and ethnic groups. The study's purpose is to examine how political and ideological issues were represented in nationally standardized grade-four social studies textbooks from 1978 to 1995; how the textbook portrayed the history of cultural and ethnic groups as well as both genders in Taiwan; and whether the ideology changed because of political and socioeconomic pressures. In order to explore this question, two series of textbooks were examined. The first series was published between 1978 and 1989, the second between 1989 and 1995. Two social studies textbooks from each series were examined. The study's theoretic framework centers on the relationship between legitimated knowledge and the textbooks, employing the methodology of textbook analysis. Three themes were examined: (1) Taiwan's historical development, (2) national identity and nationalism, and (3) ethnic and gender studies. Two analyses were applied in each theme: (1) story-line analysis and (2) language analysis.