Over the centuries, many other societies have declined, collapsed or died out. Famous victims include the Anasazi
in the American Southwest, who abandoned their cities in
the 12th century because of environmental problems and
climate change, and the Greenland Norse, who
disappeared in the 15th century because of all five
interacting factors on the checklist. There were also the
ancient Fertile Crescent societies, the Khmer at Angkor
Wat, the Moche society of Peru - the list goes on.
What is Diamond's claim in this passage?
A. The Anasazi could have survived
B. The American Southwest is more habitable than Greenland
C. Societal decline and failure is common
D. Societies have stopped failing in the last two centuries,