Final answer:
Dr. Elisabeth Kübler-Ross discovered the five-stage model of grief, including denial, anger, bargaining, depression, and acceptance, which she detailed in her 1969 book 'On Death and Dying'. Her work significantly advanced the field of thanatology.
Step-by-step explanation:
Psychologist Dr. Elisabeth Kübler-Ross discovered and developed the five-stage model of grief commonly known as the Kübler-Ross model. This model is composed of the stages of denial, anger, bargaining, depression, and acceptance, outlining the common emotional journey that many people experience when they are confronted with their own mortality or a significant loss. Her seminal work in this area was first published in the book 'On Death and Dying' in 1969, breaking new ground in the field of thanatology, the systematic study of death and dying.
While Kübler-Ross's model has been influential, it is also important to recognize that individuals may experience these stages in different orders, and not everyone goes through all of them. Moreover, factors such as personal coping mechanisms, cultural background, and religious or spiritual beliefs can influence how someone reacts to impending death or loss.
The book 'On Death and Dying' and its model continue to be a touchstone for professionals such as sociologists, social workers, health practitioners, and therapists who work with individuals coping with death.