Anthropology is the study of humans and humanity, i.e. of homo sapiens as a species and the features which make them distinctive as a species. Generally, anthropology functions as a scientific field, although it gains its motivations from the traditional project of a philosophical anthropology in antiquity which looks to discover the essence of humanity in order that the existential purpose of humanity is elucidated. Or, a modern project that looks to simultaneously naturalize the human subject and evaluate the normative privileging of humanity by the human subject, as well as the relationship between human nature and this privileging. Given these projects, anthropology often involves archeological, historical and ethnographic methods to excavate the origins and inklings of features or behaviors popularly seen to be distinctive to homo sapiens, model the relationships among these distinctive features, and speculate about the objective conditions of possibility for the emergence of a human subject.