Minerals and Metals in Ancient India v1.c11.s19.3

v1.c11.s19.3

It is very difficult to say who the people were and what was definitely the most important cause of the decline of the urban character of the Indus Valley. It is generally believed that the decline was due to the drying up of the rivers, or to the change in the course of the rivers, or to the exhaustion of the soil, or to the deforestation of the surrounding areas, or to the invasion of the Aryans, or to the recurring floods, or to the devastating epidemics.