The scope of this study is to analyse the phenomenon climate migration through the theories Securitization, Externalization of Border and World Systems Analysis. The study seeks answers to how factors and structures have limited the rights of climate refugees in the modern world system by analysing what obstacles and opportunities exist on the issue. The World System Analysis explains the underlying structures of the current world system and how it has generated climate migration as well as states' desire to preserve their sovereignty. The World System Analysis can also provide an explanation how these structures have led to a securitization of migration, which manifests itself through the implementation of several mechanisms such as Externalization of Border to stop the imaginary threat that climate refugees are viewed as. The study was conducted via qualitative text analysis of carefully selected articles and books to bring several relevant perspectives to the study. The study formulates conclusions based on both historical- and contemporary events to bring clarity to the issue on what space climate refugees have in the modern world system.