This article outlines one way in which Joseph Ratzinger’s eschatology could contribute to reducing the risk humanity now creates to its own survival. Studies of ‘Existential Risk’ warn that hazards arising from Artificial Intelligence, Nuclear Weapons, Climate Change, and Engineered Pathogens require mitigation to safeguard the future of the human race from a calamitous end. Preventative measures, however, entail sacrifice, and there is no shortage of resistance to regulation of behaviours and technological development. Ethics of empathy, utility, and duties reach breaking point when stretched to overcome the temporal and moral gap between present agency and future well-being.

This article proposes that Ratzinger’s theology of history and commitment to eschatological realism offers an intertwined double benefit: his warning about the danger of conflating hope in God’s Kingdom with hope in a future world humanity could perfect for itself opens up the uniquely rich ground of a trans-historical hope in Jesus Christ, in which an impactful relationship of love for humanity’s future can put down roots today.