Ian Stevenson

Ian Stevenson, M.D., was a Canadian professor of psychiatry. He worked at the University of Virginia, in the area of parapsychology.
Stevenson thought that the idea of reincarnation might help modern medicine better understand aspects of human behavior and development. He traveled a lot over a period of 40 years to investigate 3,000 childhood cases that suggested to him the possibility of past lives. 
Stevenson saw reincarnation as the survival of the personality after death, although he never suggested a physical way a personality might survive death.
Stevenson's research was the subject of Jim B. Tucker's "Life Before Life" (2005).
Reincarnation research.
Stevenson found that the best evidence supporting the belief in reincarnation comes from the cases of young children who, typically between the ages of 2 and 5, make statements about a previous life they claim to have had before being born. Their statements are often accompanied by behaviour that is unusual for their family but appropriate for the life that the child claims to remember. There is often a "forgetting of the imaged memories between the ages of 5 and 8; a high incidence of violent death claimed in the claimed previous life; and mention of the mode of death by the subject".
Some 35 per cent of the subjects have birthmarks or birth defects which often correspond to injuries or illness experienced by the deceased person who the subject remembers. Medical documents have confirmed this correspondence in more than forty cases.
Selected books.
Ian Stevenson authored or co-authored more than a dozen books. Stevenson died in 2007, and many of these books are mentioned in his obituaries in the "British Medical Journal", "New York Times", and the "Washington Post".