science: anthropology. By the end of the 19th century, an orthodoxy on "primitive society" had emerged, but few anthropologists still would accept that definition. The "19th-century armchair anthropologists" argued, that "primitive society" (an evolutionary category) was ordered by kinship and divided into exogamous descent groups related by a series of marriage exchanges. Their religion was animism, the belief that natural species and objects had souls. With the development of private property, the descent groups were displaced by the emergence of the territorial state. These rituals and beliefs eventually evolved over time into the vast array of "developed" religions. According to Tylor, as society became more scientifically advanced, fewer members of that society would believe in animism. However, any remnant ideologies of souls or spirits, to Tylor, represented "survivals" of the original animism of early humanity. Confounding animism with totemism In 1869 (three years after Tylor proposed his definition of animism), Edinburgh lawyer John Ferguson McLennan, argued that the animistic thinking evident in fetishism gave rise to a religion he named totemism. Primitive people believed, he argued, that they were descended from the same species as their totemic animal. Subsequent debate by the "armchair anthropologists" (including J. J. Bachofen, Émile Durkheim, and Sigmund Freud) remained focused on totemism rather than animism, with few directly challenging Tylor's definition. Anthropologists "have commonly avoided the issue of animism and even the term itself rather than revisit this prevalent notion in light of their new and rich ethnographies." According to anthropologist Tim Ingold, animism shares similarities with totemism but differs in its focus on individual spirit beings which help to perpetuate life, whereas totemism more typically holds that there is a primary source, such as the land itself or the ancestors, who provide the basis to life. Certain indigenous religious groups such as the Australian Aboriginals are more typically totemic in their worldview, whereas others like the Inuit are more typically animistic. From his studies into child development, Jean Piaget suggested that children were born with an innate animist worldview in which they anthropomorphized inanimate objects and that it was only later that they grew out of this belief. Conversely, from her ethnographic research, Margaret Mead argued the opposite, believing that children were not born with an animist worldview but that they became acculturated to such beliefs as they were educated by their society. Stewart Guthrie saw animism—or "attribution" as he preferred it—as an evolutionary