To increase awareness of learners about peace and conflict management is emphasized in all educational systems. Therefore, to cultivate skills of coexistence, understanding, tolerance and friendship among nations as a paradox and challenge in globalization process are placed on the agenda of institutes affiliated to the United Nations. Since the educational system in Iran is text oriented, therefore, textbooks may have crucial impact on depth and way of thinking of learners. In fact, the content of textbooks is one of socialization factors facilitating dialogue in a pluralistic environment. Therefore, the present study, using content analysis, examined the impact of the humanities textbooks taught at secondary level on peace education, based on concepts of "we", "others", and "relationship of Iran with other countries". Results indicated that the main direction of textbooks is based on preserving national solidarity and territorial integrity, raising awareness about enemies, colonial policies of the West, imbalance of power in the world, international political, economic, and cultural interactions, as well as encountering conspiracy and enemy attack.