“He once sent fifty horsemen with pikes to destroy an entire province. Not a single human being survived that massacre, neither women nor children, nor ages infirm This terrible massacre was punishment for a trifling offense: some Indians had not responded to a summons promptly enough when the tyrant had commanded that they bring him a load of maize, or else had asked for more Indians to be assigned to serve him or his comrades. And there was no place where the Indians could take refuge” The purpose of the author of the passage was most likely to

The constant presence of diseases or infectious agents within a given geographic area or population group. it may also refer to the usual prevalence of a given disease with such area or group. it includes holoendemic and hyperendemic diseases. a holoendemic disease is one for which a high prevalent level of infection begins early in life and affects most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than do children (malaria in many communities is a holoendemic disease). a hyperendemic disease is one that is constantly present at a high incidence and/or prevalence rate and affects all groups equally. so probably family history.