| | Nauruans descended from Polynesian and Micronesian seafarers. Grouped in clans or tribes, early Nauruans traced their descent on the female side. They believed in a female deity, Eijebong, and a spirit land, also an island, called Buitani. Two of the 12 original tribal groups became extinct during the 20th century. Because of poor diet, alcohol abuse, and unemployment, Nauru has the world's highest level of diabetes, renal failure and heart disease, exceeding 40% of the population. |