ocr: PNG has an extraordinary diversity ofpeoples, with around 750 ditterent language groups and even ulE tribes. The key distinction is between the lowlanders, who have frequent contacts with the outside world, and the very isolated, but increasingly threatened, highlanders. Great tensions exist between highland tribes; anyone who is not a "wontok" (of - one's tribe) is seenas potentially hostile. Vendettas can often last several generations.
