Hope and trust are key problems of the present world and should therefore be at the centre of interest of science and society. Climate change, pandemics, dangerous global and social polarization, people's distrust of politics and institutions, social isolation and the rise of mental problems in developed countries of material prosperity are problems that we will only be able to cope with if we know how to cultivate hope and trust. The authors deal with them from various aspects of the humanities: philosophy, theology, religious studies, intellectual history, cognitive science, psychology and psychotherapy. This gives the book an interdisciplinary character.