What kind of cosmological background assumptions do we make as we tackle international and global challenges today and where do our assumptions (about states, individuals, or the international) come from? Can we reorient our cosmological imaginations and what would this mean for the study and practice of international politics? International Relations and Relational Cosmology argues, with the help of relational cosmology and relational theories that we live in a world without ‘things’, a world of processes and relations. It also suggests that we live in relations which exceed the boundaries of the human and the social, in planetary relations with plants and animals. The book offers a reorientation to the universe of relations, to International Relations as a field of study and to political practices.