Man has always pondered if we continue on after the death of the physical form. Religions have been based on the promise of an afterlife and people have died momentarily, to be brought back with stories of their experiences in another realm.
Raymond Moody began with a few advanced degrees including philosophy and psychology. He eventually became a professor and a forensic psychiatrist.
In the 1970s, Raymond Moody made the term near-death experience the newest speculation. He compiled stories of hundreds of people who had memories after they lost all vital signs, and their stories seemed to repeat similar themes over and over again until the researcher could not ignore the conclusion - there is life after life.
The 1975 book,"Life After Life" was Raymond Moody's groundbreaking book about these people and their experiences.
His book was met in the 70s with a lot of criticism and an almost cult-like following of people who wanted to believe. The stories are anecdotal and Moody's own belief system included a belief in afterlife. He was criticized for not taking into account hallucinogenic effects of the mind, as well as using anecdotal cases to prove a scientific point.
Moody was undaunted by the skeptics and advanced his knowledge of cases of near-death experiences (NDEs). He went on to work with the concept of the psychomanteum, a theater for the dead. This process includes specific placement, items, lighting and state of mind in order to have an encounter with the dead.
It's interesting how very polarizing this subject can be for people. They come to think that believing in the afterlife means believing in God or Heaven, but it's not necessarily a spiritual experience. Perhaps what we are talking about is another aspect of life. Life may not be the finite activity have viewed it as, but is actually a process that unfolds in many incarnations, one of those without the use of the physical/biological form.
Perhaps a side effect of having died is to move into another realm of existence that no longer needs the shell but adapts to a body-less continuation, as endless as the universe.