as an ethnographer and social critic and in addition to conducting research in israel, he was active among the anaguta of the jos plateau in nigeria during the last years of british colonial rule; among the seneca nation of upstate new york; and in biafra during the 1967-1970 biafran war, when he advocated for biafran independence. diamond is also known for having founded social-science journal "dialectical anthropology" in 1976.