Dr. Elisabeth Kübler-Ross was a Swiss-born psychiatrist known for her work on death and dying. She authored the groundbreaking book On Death and Dying, which introduced the five stages of grief: denial, anger, bargaining, depression, and acceptance. Her extensive work with terminally ill patients led her to challenge traditional views on treating the dying. She encouraged more compassionate end-of-life care and founded hospice organizations. Kübler-Ross continued researching and writing about death until her own passing in 2004 at age 78.