why is no one definite reson for decline of the Harappan civilisation
Answers
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●According to the geologists there is an extreme natural condition/event which is characterised by many natural calamities like floods, earthquakes, Tsunami, droughts, extreme geotectonic movements, climate change, volcanic eruptions, meteor showers, etc. They termed this event as Kiloyear Event. During a Kiloyear event the Earth goes through an extreme phase where all the places experience natural calamities. Kiloyear Event takes place after every 5 to 10 thousand years. The recent Kiloyear Event took place in the 3rd Millennium BCE (around 2200 BCE). The Kiloyear 4.2 is especially characterized by the process of rapid aridification of land. The complete decline of Indus Valley Civilization took place in the 2nd Millennium BCE. Almost all of the Indus Valley sites are today located on the arid regions.
◍Hence, the decline of Indus Valley Civilization is also related to Kiloyear Event. IVC was not the only one to experience natural calamities but such type of incidents were also experienced by the other Civilizations prevailing in that time like Akkadian of Mesopotamia, Mayan of Central America and Egyptian.
◍If we refer the ancient Indian literature, we get to know about a situation called Pralay. Pralay has many similarities with the Kiloyear Event. Both the situations are characterized by some extreme calamities which lead to destruction. Pralay takes place in the transition period i.e the period between the two Yugas. So the recent Pralay according to the ancient texts must have occurred between Dwapar Yuga and Kali Yuga. According to the Archaeoastronomical datings the Kali Yuga started in 3102 BCE. Therefore the decline of Indus Valley Civilization also started after 3102 BCE. The natural calamities must have drastically affected the urban settlements of Indus Valley Civilization thus forcing the people to abandon the settlements and settle in some remote places unaffected by the calamities. This gave rise to the rural and tribal Societies.
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Explanation:
Definite reason that led to the decline of the Indus Valley Civilization is not known, as no reliable resource of that period is available at present. ... It has been found out that around 2000 BC some major climatic changes started occurring in the Indus Valley. These changes had led to floods in the plains and cities.