A psychosocial approach is taken to explore the impact of evolutionary-based, biological changes on health and wellbeing during adulthood and older age. Lifespan theory is used as a framework to understand culturally conditioned and historically positioned life-stages. The intersectional nature of status ascribed to different social groups is considered through recurring themes of gender, ethnicity, class, sexuality, spirituality, and class, particularly when living in a techno-post-Covid-19 society. Exploration of such issues can help inform the professional practice of those concerned with the health and wellbeing of adults and older people within current Western society. Chapters include Psychosocial Theories; Identity and Family Formation; The Sandwich Generation; Later Life; Medicalised Lives and Competing Concepts of Care; Neurodiversity; Degenerative Conditions, and Bereavement, Grief, and Death.