There might be resource shortage to sustain the population, and then people moved towards south India. Though there are various theories, the exact reason is still unknown. As per a recent study by IIT Kharagpur and Archaeological Survey of India, a weaker monsoon might have been the cause of decline of Indus Valley Civilization. Environmental changes, coupled with loss of power of rulers of Indus valley to sustain the city life might be the cause. There were activities of proto-humans in the Indian subcontinent 20 lakh years ago, and of Homo sapiens since 70,000 BC. Indus Valley Civilization was the first major civilization in south Asia, which spread across a vast area of land in present day India and Pakistan. The time period of mature Indus Valley Civilization is estimated between BC. But they were gathers/hunters. Before 1947, India was divided into two main entities – The British India which consisted of 11 provinces and the Princely states ruled by Indian princes under subsidiary alliance policy. The two entities merged together to form the Indian Union, but many of the legacy systems in British India is followed even now. The reference material for this post is NCERT History text for Class 6. Only main points from each chapter is compiled below. Dravidians and Aryans are believed to be immigrants who came later to the sub-continent. Ancient India can be studied under other heads like Paleolithic, Mesolithic, Neolithic and Chalcolithic period – based on the type of stone/ metal tools people used. The reference material for this post is NCERT History text for Class 6. Only main points from each chapter is compiled below. Our advice is to first go through the respective NCERT text and use this compilation then for quick revision. We believe that this listing will come handy during exam time. Almost every UPSC topper has repeated the importance of reading NCERT school texts. These are texts which help to build the fundamentals. In this article, we will be dealing with the important points filtered out from NCERT school text for Standard 6 History. We plan to cover main points from NCERT texts for different classes and subjects in our future posts. Though there are various theories, the exact reason is still unknown. As per a recent study by IIT Kharagpur and Archaeological Survey of India, a weaker monsoon might have been the cause of decline of Indus Valley Civilization. Environmental changes, coupled with loss of power of rulers of Indus valley to sustain the city life might be the cause. There were activities of proto-humans in the Indian subcontinent 20 lakh years ago, and of Homo sapiens since 70,000 BC
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