This work analyzes how the Women\u27s International League for Peace and Freedom (WILPF) sought to influence how the League of Nations approached questions of nationality and statelessness between 1918 and 1931. Especially important were the WILPF\u27s efforts to aid women and children who remained in Turkey following the Armenian genocide, as well as the organization\u27s efforts to address the statelessness crisis that arose following the dissolution of Austria-Hungary. Their activism helped to pressure the League of Nations into creating the Commission of Enquiry on Deported Women and Children in Turkey and Asia Minor. Their efforts to end statelessness culminated in the creation of a 1930 Convention on Statelessness, which brought together members from a number of international organizations. Though the WILPF\u27s efforts met with limited success, their activism shows that women viewed their voices as necessary in debates over nationality. Additionally, their activism suggests early continuity between the collective right of national self-determination and later twentieth-century conceptions of individual rights. The thesis thus demonstrates that the WILPF\u27s expansive understanding of peacemaking blurred the distinction between social reform and international politics. It furthermore argues that the WILPF should be properly understood as an early human rights organization