The evolutionary theories of religion attempt to explain the origin and development of religion as a gradual outcome of human intellectual, psychological, and social evolution. These theories emerged mainly during the nineteenth century, influenced by Charles Darwin's theory of biological evolution and the belief that human societies progress from simple to complex forms. Early anthropologists and sociologists argued that religion evolved through successive stages as human understanding of the world became more sophisticated. Edward Burnett Tylor is regarded as one of the earliest proponents of the evolutionary theory of religion. In his work *Primitive Culture* (1871), Tylor proposed that religion originated from animism, which he defined as the belief in spiritual beings. According to him, early humans sought explanations for dreams, death, sleep, and natural phenomena. They concluded that every living and non-living object possessed a soul or spirit. This belief in spirits gradually developed