Final answer:
Sir Edward Burnett Tylor is the anthropologist who theorized that religion originated from people's dreams, particularly through the practice of animism, where dreams played a significant role in shaping spiritual beliefs.
Step-by-step explanation:
The anthropologist who believed that religion originated in people's dreams is Sir Edward Burnett Tylor. Tylor proposed that animism, the belief that plants, animals, inanimate objects, and natural phenomena possess a spiritual essence, was the earliest form of religious practice. He suggested that ordinary experiences such as dreaming were pivotal in forming spiritual beliefs. In dreams, people might perceive traveling to other places or communicating with deceased loved ones, contributing to the belief that there's more to the world than meets the eye. These dream experiences, along with the need to answer life's meaning, Tylor argued, set the foundation for all religious systems.