Numerous other ethnographic techniques have resulted in ethnographic writing or details being preserved, as cultural anthropologists also curate materials, spend long hours in libraries, churches and schools poring over records, investigate graveyards, and decipher ancient scripts. A typical ethnography will also include information about physical geography, climate and habitat. It is meant to be a holistic piece of writing about the people in question, and today often includes the longest possible timeline of past events that the ethnographer can obtain through primary and secondary research. Bronisław Malinowski developed the ethnographic method, and Franz Boas taught it in the United States. Boas' students such as Alfred L. Kroeber, Ruth Benedict and Margaret Mead drew on his conception of culture and cultural relativism to develop cultural anthropology in the United States. Simultaneously, Malinowski and A.R. Radcliffe Brown’s students were developing social anthropology in the United Kingdom. Whereas cultural anthropology focused on symbols and values, social anthropology focused on social groups and institutions. Today socio-cultural anthropologists attend to all these elements. In the early 20th century, socio-cultural anthropology developed in different forms in Europe and in the United States. European "social anthropologists" focused on observed social behaviors and on "social structure", that is, on relationships among social roles (for example, husband and wife, or parent and child) and social institutions (for example, religion, economy, and politics). American "cultural anthropologists" focused on the ways people expressed their view of themselves and their world, especially in symbolic forms, such as art and myths. These two approaches frequently converged and generally complemented one another. For example, kinship and leadership function both as symbolic systems and as social institutions. Today almost all socio-cultural anthropologists refer to the work of both sets of predecessors, and have an equal interest in what people do and in what people say. One means by which anthropologists combat ethnocentrism is to engage in the process of cross-cultural comparison. It is important to test so-called "human universals" against the ethnographic record. Monogamy, for example, is frequently touted as a universal human trait, yet comparative study shows that it is not. The Human Relations Area Files, Inc. (HRAF) is a research agency based at Yale University. Since 1949, its mission has been to encourage and facilitate worldwide comparative studies of human culture, society, and behavior in the past and present. The name came from the Institute of Human Relations, an interdisciplinary program/building at Yale at the time.