demographic transition-The period beginning with the widespread distribution of modern medicine, and continuing into the present, during which population size has increased very rapidly. Prior to modern medicine, high birth rates of traditional societies were matched by high death rates, particularly the mortality rates affecting infants and young children. During the demographic transition, high birth rates continue but the mortality rate has been greatly reduced, so rapid population growth occurs. Disease-A scientifically identified health threat caused by bacteria, virus, fungus, parasites, or other discernible pathogen Etiquette-Rules and customs pertaining to correct behavior in social situations. Often such rules are particular to specific cultures, but some apply more generally. Feast-Ostensibly social gathering, often motivated by the need to establish alliance treacherous feast-Among the Yanomamo, a feast designed to end in massacre of the male guests and abduction of their women
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