http://abe-no-seimei.livejournal.com/ ([identity profile] abe-no-seimei.livejournal.com) wrote in [community profile] fandomhigh2005-10-24 08:02 pm

Introduction to World History to 1600 - #18

Introduction to World History to 1600 (Terran)
Monday 1:00-3:00 pm


“My apologies for canceling classes last week. I hope everyone made use of the time wisely. And we’re ready to continue with our lessons,” Seimei said as he glided into class. His fan waved toward the front of the classroom and the discussion question on the scroll.

Discuss contributing factors for the early Indus civilization collapse.

[identity profile] lisacuddy.livejournal.com 2005-10-25 01:36 am (UTC)(link)
A possible natural reason of the IVC's decline is connected with climate change. In 2600 BC, the Indus Valley was verdant, forested, and teeming with wildlife. It was wetter, too; floods were a problem and appear, on more than one occasion, to have overwhelmed certain settlements. As a result, Indus civilization people supplemented their diet with hunting. By 1800 BC, the climate is known to have changed. It became significantly cooler and drier.

The crucial factor may have been the disappearance of substantial portions of the Ghaggar-Hakra river system. A tectonic event may have diverted the system's sources toward the Ganges Plain, though there is some uncertainty about the date of this event. Such a statement may seem dubious if one does not realize that the transition between the Indus and Gangetic plains amounts to a matter of inches. The region in which the river's waters formerly arose is known to be geologically active, and there is evidence of major tectonic events at the time the Indus civilization collapsed.