Since the International Atomic Energy Agency (IAEA) reported about the possible clandestine goals of Iran’s nuclear program , the P5+1 group (consisting of the US, the UK, France, Russia and China ...Show moreSince the International Atomic Energy Agency (IAEA) reported about the possible clandestine goals of Iran’s nuclear program , the P5+1 group (consisting of the US, the UK, France, Russia and China + Germany) suspects Iran of covertly building a nuclear weapon . The aim of the thesis is to demonstrate why states abide by the nuclear non-proliferation norm in general. Specifically, the research aims to gain insights into the Iranian political decision-making on the nuclear issue in order to answer the question whether the choice in 2013 to abide by the nuclear non-proliferation norm is caused by the logic of consequences, the logic of appropriateness, or both. The research takes a constructivist approach and uses Checkel’s (1997) model of domestic norm implementation and the spiral model of Risse and Sikkink (1999) to analyze how these logics of behavior and the domestic political structure influence the Iranian elite decision-making process. It is expected that, in accordance with these models, the election of a new president in June 2013 has fostered further domestic norm implementation. Negotiation proposals of both Iran and the P5+1 group, together with IAEA and United Nations Security Council resolutions, are analyzed through process tracing. The results show that while from 2005 to 2013 the Iranian governments followed a logic of consequences and defied international sanctions, the current government’s behavior seems to be based predominantly on a logic of appropriateness and cooperates more willingly with the P5+1 and appears to abide by the nuclear non-proliferation norm.Show less