Thanks to Derek Freeman's work, a lot of people know that the anthropologist Margaret Mead was hoaxed into believing that young Samoan girls were far more sexually active than they actually were. But Mead made influential claims about other cultures as well, about which she apparently was just as wrong, according to this article in Front Page Magazine
. For instance, she claimed that the Mountain Arapesh, a tribe of New Guinea yam gardeners, had no knowledge of the concept of war. Not quite. Other researchers later found that about half the adult male Arapesh had killed people in battle.