In a long period of severe heat or cold, most of civilians had a really rough time in obtaining foods to feed their families.
Under such conditions, people will have a greater tendency toward violence as a desperate attempt to survive.
Because of this, more wars and rebellions tend to happen within long period of sever cold or heat.
The ancient Maya, a diverse group of indigenous people who lived in parts of present-day Mexico, Belize, Guatemala, El Salvador and Honduras, had one of the most sophisticated and complex civilizations in the Western Hemisphere. Between about 300 and 900 A.D., the Maya were responsible for a number of remarkable scientific achievements–in astronomy, agriculture, engineering and communications.
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о чем ты говоришь? до н.э. я даже не знаю
