Ella Cara Deloria, also called Aŋpétu Wašté Wiŋ, was a Yankton Dakota (Sioux) educator, anthropologist, ethnographer, linguist, and novelist. She recorded Native American oral history and contributed to the study of Native American languages. According to Cotera (2008), Deloria was "a pre-eminent expert on Dakota/Lakota/Nakota cultural religious, and linguistic practices." In the 1940s, Deloria wrote a novel titled Waterlily, which was published in 1988, and republished in 2009.

An anthropologist is a person engaged in the practice of anthropology. Anthropology is the study of aspects of humans within past and present societies. Social anthropology, cultural anthropology and philosophical anthropology study the norms, values, and general behavior of societies. Linguistic anthropology studies how language affects social life, while economic anthropology studies human economic behavior. Biological (physical), forensic and medical anthropology study the biological development of humans, the application of biological anthropology in a legal setting and the study of diseases and their impacts on humans over time, respectively.