In contrast to most cultural anthropologists at the time, who conducted their fieldwork in a single community, Ember's fieldwork in American Samoa was explicitly comparative, using community variation to test theories about culture change. He chose three communities differing in distance from the commercial center to evaluate how commercial involvement affected political change. His assessment of Samoan kinship was subsequently challenged by Derek Freeman, long before the now-famous Mead–Freeman controversy about Samoa. Because Ember knew, from his cross-community comparisons, that there was substantial variation within American Samoa, he questioned how Freeman, working in a very different time and in Western Samoa, could doubt Mead’s veracity.
At the NationalInstitute of Mental Health Embler worked on the universality of the familial incest taboo. Since all societies prohibit familial incest, he decided to focus on cross-cultural variation in cousin marriage to try to understand why some societies allowed close cousin marriages while others forbade it. After evaluating the various explanatory hypotheses of the time, his own empirical research confirmed that much of the variation in cousin marriage could best be explained as an adaptation to the harmful effects of inbreeding.
Cross-cultural work
As a professor at Antioch College and Hunter College Ember continued his cross-cultural work on aspects of kinship and social organization, picking up first on topics that Murdock was unable to explain, such as variation in post-marital residence and unilineal descent. Traditional theories had focused on economic factors, such as which gender contributed most to the economy, but finding these explanations lacking in predictive value, Ember began to explore other possibilities, particularly the effects of warfare in the social environment. Because warfare seemed so central in explaining various aspects of social organization, he then turned to research that tested ideas about why societies varied in type and frequency of violence, looking at variation in warfare frequency, homicide, and corporal punishment of children in the anthropological record. Believing that laws about human nature should hold true among technological complex as well as simpler societies, he persuaded political scientistBruce Russett to join him and his wife Carol R. Ember in a project to test the theory that “democracies do not fight each other”. Although the concepts of democracy and international war had to be transformed to fit the anthropological record, the results of their collaborative research were consistent with many studies conducted by political scientists. Ember later worked with cross-cultural psychologists to explore the relationships between aggression and war.
Interdisciplinary research
Branching out into diverse and interdisciplinary research areas was not unusual for Ember. Indeed, he published scholarly articles in archaeology, linguistics, biological anthropology, and even ethology. He fervently believed that the work of different anthropologists in far-flung places and across time could be used to test theories about why cultures varied or were similar and he devoted most of his research career to systematically testing explanations, rather than just expounding them. His passion for systematic comparative research on challenging questions in all areas of anthropology influenced a generation of younger scholars through his direction of the first Summer Institute for Cross-Cultural Research in 1964, his active participation in NSF-funded Summer Institutes in Comparative Research between 1991 and 1999, and through the series of publications in comparative methods that resulted from these Institutes.
Publications
Ember is widely known as the co-author of two major textbooks, Anthropology, and Cultural Anthropology, first published in 1973 and now in their 13th edition. He was also editor or co-editor of eight encyclopedias.