Welcome to the APWH blog for Mr. O'Donnell's Rocklin High classes for the 2009-2010 school year.
What is required of students is to create at least ONE post this year and to make TWO comments on mine or another students posting.
longest-lived civilizations, and as such, has a long history of war and fighting within itself. Obviously, each instance of war, usually happening after or during the collapse of a dynasty, has its own unique causes. But, recent research suggests that almost all of those instances can be liked to climate changes. Comparing 2 sets of data, scientists discovered that when a dynasty, such as the Han and Ming collapsed, it often occurred partly due to food shortage. These food shortages were caused by slight drops in the climate ruining the steppe grasses used to feed critical livestock, forcing food prices to sharply rise, ruining the economy, and in turn, the empire. These climate changes occur naturally every few hundred years, but recent studies suggest global warming may speed up the process, which means that more food shortages may be on the way.