The essay looks at longevity narratives as an important configuration of old age, which is closely related to evolutionary theories of ageing. In order to analyse two case studies of longevity published in the early twentieth century, the American psychologist G. Stanley Hall's book Senescence (1922) and the British dramatist Bernard Shaw's play cycle Back to Methuselah (1921), the essay draws on an outline of theories of longevity from the Enlightenment to the present. The analysis of the two case studies illustrates that evolutionary and cultural perspectives on ageing and longevity are ambivalent and problematic. In Hall's and Shaw's texts this is related to a crisis narrative of culture and civilization against which both writers place their specific solutions of individual and species longevity. Whereas Hall employs autobiographical accounts of artists as examples of longevity to strengthen his argument about wise old men as exclusive repositories of knowledge, Shaw in his vision of longevity as an extended form of midlife for both genders encounters the limits of age representation.