Final answer:
Edgar Cayce, known as the 'Sleeping Prophet', was a 20th century psychic from Virginia Beach who claimed to have lived in Atlantis in a past life and taught about reincarnation and mysticism.
Step-by-step explanation:
The individual known as the “Sleeping Prophet” was Edgar Cayce. He was a 20th century mystic and psychic from Virginia Beach, who claimed to have lived in Atlantis in a past life. Cayce was renowned for his psychic readings, which were given while he was in a state of sleep, hence the moniker. His teachings included the belief in reincarnation and the practice of various mystical and spiritual activities. While there is no scientific proof of his claims, Edgar Cayce has a notable legacy and a following that persists to this day.