EARTH - Study: Violence, infectious disease and climate change contributed to Indus civilization collapse

A new study on the human skeletal remains from the ancient Indus city of Harappa provides evidence that inter-personal violence and infectious diseases played a role in the demise of the Indus, or Harappan Civilization around 4,000 years ago ...

http://phys.org/news/2014-01-violence-infectious-disease-climate-contr