Many scholars believe that the collapse of the Indus Valley Civilization was caused by climate change. Some experts believe the drying of the Saraswati River, which began around 1900 BCE, was the main cause for climate change, while others conclude that a great flood struck the area.
According to another theory by British archaeologist Mortimer Wheeler, a nomadic, Indo-European tribe, called the Aryans, suddenly overwhelmed and conquered the Indus River Valley.
There are a number of ways of looking at the WTO. It’s an organization for liberalizing trade. It’s a forum for governments to negotiate trade agreements. It’s a place for them to settle trade disputes. It operates a system of trade rules