This book seeks to construct a Muslim-Christian theological discourse on creation and humanity, which could help adherents of both faiths work together to preserve our planet, bring justice to its most needy inhabitants and contribute to peacebuilding in areas of conflict. Drawing from the disciplines of theology, philosophy, ethics, hermeneutics, critical theory and the social sciences, its premise is that theology is always developed in particular situations. A first part explores the global context of postmodernity (the post-Cold War world dominated by a neoliberal capitalist system) and the influential turn away from the modern Cartesian view of the autonomous, disembodied self, to a self defined in discourse, community and culture (postmodernism). A second part traces the career of Q. 2:30 (Adam’s God-mandated trusteeship), first in Islamic commentaries in the classical period and then in the writings of Muslim scholars in the modern and postmodern periods. The concept of human trusteeship under God is also studied over time in Christian and Jewish writers. The third part, building on the previous data, draws together the essential elements for a Muslim-Christian theology of human trusteeship.