This volume is based on The Royal Institute of Philosophy's London Lecture series for 2017–18. It consists of fourteen original papers in which leading philosophers consider key concepts in the area, including those of passion and emotion, and their intentionality, as well as love, guilt, forgiveness, desire and regret. The relationships between the passions and religious belief and to aesthetics are also analysed, alongside the ethical and psychoanalytical implications of our emotions. Connexions between the passions and our reading of fiction and our response to developments in technology are considered, as is the work of Descartes, Spinoza, Nietzsche, William James and R. G. Collingwood. This book will be an essential compendium to contemporary work in the area.