Negative socio-psychological repertoire about adversary exists in many societies plunged in conflicts. The challenge is how to make the structure of the society more flexible for a conflict resolution with enemies. This article examines the attempts of a pro-Iran-deal civil society, the - International Crisis Group, to change the negative societal beliefs regarding Iran, which exist in the American society. By using the unfreezing theory of Bar-Tal and Halperin (2011 b) as well as the NVIVO 12, which is qualitative content analysis methodology, this paper attempts to analyze this procedure from 2011 to 2016. The International Crisis Group made an effort to break the rigidity of barriers and remove their content in the American society. This trend of Iran unfreezing started in 2011 and increased in 2013, during the presidency of Hassan Rohani in Iran. Results indicate that the International Crisis Group fought against the rigid discourse that exists in the US about Iran through four main principles: removing the perception of Iran as a threat, legitimizing and humanizing Iran’s image, emphasizing the importance of the course of time, and expanding new information and alternative data about the US-Iran conflict. This new information aimed at justifying Iran’s actions and giving roadmaps for the future policies of the US toward Iran.
