3-4% of world population is a dent. But non-nuclear/non-biological wars are hardly civilization ending events. Things like deaths of mesoamerican civs due to

3-4% of world population is a dent. But non-nuclear/non-biological wars are hardly civilization ending events. Things like deaths of mesoamerican civs due to destroying their environment http://news.nationalgeographic.com/news/2003/03/0313_030313_mayadrought_2.html http://news.nationalgeographic.com/news/2003/03/0313_030313_.... Or all of america after 2nd european invasion. Ever hear of the mississippi mound builders? I'd expect not since there civ was totally wiped out. And civ bending doesn't mean everyone's dead. Just large enough population drop to break the institutions and social order supported by that population.