Physical, social and spiritual lifespans in the Digital AgeWe suggest that the human lifespan in the Digital Age is made up of three main layers: physical, social and digital (Walter et al. 2012). A fourth one may also be present -the spiritual lifespan. These layers do not run in direct parallel. Their start points may be asynchronous, and the time and cause of 'death' will vary. A user can persist digitally long after they have died physically.For most of us, death will come in old age, after a prolonged physical decline, beset by multiple conditions. By 2030, 86 per cent of deaths are expected to be of older adults (people aged over 65), and 44 per cent of deaths of those will be over 85 (Leadbeter & Garber 2010). Routine bureaucratic processes are associated with physical death. Even death itself is subject to legal definition: in western medical terms, 'death' generally refers to brain death (Lock 2001). The time, date and cause of death are recorded, and a death certificate issued. The body is disposed of through burial, cremation, entombment or donation to medical research. Reports of the death travel through the deceased's network of relatives, friends and acquaintances by a mixture of word-of-mouth, personal correspondence, computer-mediated communication and death notices in the press.