||This thesis is engaged in the challenge that non-state actors pose for the international order in a context of human rights violations. For that, it focuses on how these actors influence international politics, mainly through their role on implementing human rights norms, taking as a study case the Western Sahara pursuit of self-determination. The international and transnational solidarity network are to be seen as advocacy networks, and their actions, history, and role on implementing human rights norms will be analyzed. The domestic dimension of this advocacy will be explored through an initiative emerged from the Dutch society – the Polisario Komitee. The transnational dimension, in its turn, will be analyzed through the European Coordinating Conference of Support to the Sahrawi People (EUCOCO). The work will shed light on how these initiatives operate, in order to analyze if they prove to be effective in promoting the change they are committed to – as well as what are the elements that influence negatively in their advocacy. For that, the methodological approach includes a combination of primary archival sources, interviews, and literature on human rights, International Relations, and advocacy networks.