Final answer:
Elisabeth Kübler-Ross wrote about the stage theory of grief in her book On Death and Dying, outlining the five stages of grief: denial, anger, bargaining, depression, and acceptance. Her work has had a significant impact on the study of death and dying.
Step-by-step explanation:
Elisabeth Kübler-Ross wrote about the stage theory of grief in her book On Death and Dying. She outlined the five stages of grief: denial, anger, bargaining, depression, and acceptance. These stages may occur in different orders and not all individuals experience all of the stages. Kübler-Ross's work has had a significant impact on the field of thanatology, the study of death and dying, and has provided a framework for understanding the process of grief.
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