Research into the near-death experience was pioneered by Raymond Moody, who published Life After Life in 1975 after studying 150 people who had had such experiences. He and other scientists, such as cardiologist Michael Sabom, found that possible physiological and psychological causes for the phenomenon, including lack of oxygen to the brain, the influence of anesthetics, disruptions in neurotransmitter release, and prior expectations, could not sufficiently account for the experiences these people described. Their findings and a belief in a spiritual explanation for the phenomenon have been supported by Elisabeth Kübler-Ross, who pioneered the study of death and dying in the United States beginning in the late 1960s.
Near-death experience is an emotional issue, believed to be a profound spiritual experience by some and criticized as wish fulfillment by others. Many skeptical scientists believe that it is a simple physiological event misconstrued by people who have a compelling psychological need or who are comforted by interpreting the experience in terms of their religious or spiritual beliefs.
See R. Moody, Life After Life (1975); K. Ring, Life at Death: a Scientific Investigation of the Near Death Experience (1980); M. B. Sabom, Recollections of Death: a Medical Investigation (1982); M. Morse, Closer to the Light (1990); B. J. Eadie, Embraced by the Light (1992); E. Kübler-Ross, On Life After Death (1994).
See B. Morris, The Birth of the Palestinian Refugee Problem, 1947-1949 (1988).