Even after decades of relatively established models for relations between states, ambiguity still exists on the question of state sovereignty. To what extent could its violation be justified? In the study of international relations there are two main perspectives on the legitimacy of such actions: liberal and realist. While the former support these measures when the state itself violates the human rights of citizens and extensive intervention is necessary (Kegley, 259), the latter argue that state sovereignty is the central assumption of this theoretical framework (Kegley, 28) and of actions that might violate it are not legitimate. The 2011 military intervention in Libya, intended to end the Gaddafi (SC) regime, can demonstrate both of these perspectives. Furthermore, it particularly highlights the responsibility of peacekeeping actors to protect the human rights of civilians. However, both realist and liberal perspectives include the legitimacy of violating state sovereignty and at the same time reveal the illegitimacy of this issue. Liberal theory emphasizes the importance of non-state actors such as political institutions, non-governmental organizations (NGOs), Intergovernmental Organizations (IGOs) in the decision-making process of world politics. All of them should act according to public international law that governs government-to-government relations (Kegley, 400). Therefore, when the Libyan government began to repress the riots and demonstrations of the civilian population with military means, the international community became cautious regarding the outcomes of such policies (UNSC). Furthermore, when the government did not respond to calls to end the violence, the UN response was the UN response. "France stops all Italian trains carrying North African immigrants." The telegraph. April 17, 2011. Web. April 28, 2012. "Iran Profile." BBC News. BBC, 3 February 2012. Web. 28 April 2012. .Kegley, Charles W. and Gregory A. Raymond. The global future: a brief introduction to world politics. 4th ed. Belmont, CA: Wadsworth, 2011. Print.Schenk, Caress. Global Security Politics: Liberal Alternatives. Lecture notes. 17 April 2012. United Nations Security Council. Security Council report. United Nations Rep., 8 November 2011. Web. 28 April. 2012. .