Backlash from climate is inevitable

A great civilisation flourished on the Indus-Saraswati basin 3,500 years before the birth of Christ. The Indus civilisation at Mohenjodaro and Harappa reached great height in terms of architecture, defence, water supply and sewerage systems. According to one theory, climate of this sub-continent started to change from 2,200 B.C when the monsoon-inducing wind from the Arabian Sea weakened and the Bay of Bengal started gaining strength. As a consequence, the regional distribution of rainfall changed beyond recognition and this geographic transformation shifted the centre of gravity of the continent's civilisation to the Ganges basin. The other theory is that with the culmination of the ice age about 8,000 B.C a warmer period followed when the glaciers of the Himalayas started melting. This began the process of river flooding in the Indus basin and maybe, the seawater also swelled and combined together to wash out the oldest civilisation on the Indus valley.
There is nothing to be surprised to see a repeat of the same event in more places around the globe, including the Ganges basin. Right now weather is behaving more capriciously than anytime known before. London has been experiencing floods unlike anything it has done in the past 250 years. Cities and towns in the United States of America have come under snowfalls and blizzard to the extent that their citizens have no knowledge of similar onslaught in the past. If it was twisters, the Americans accepted the natural phenomenon as normal. But this time, river waters have frozen in many parts of that country and this may have caused sufferings to people and animals alike but at least one captive exiled on an island got the lifetime's opportunity to walk out of his captivity to freedom. Heavy snowfall has been claiming casualties on a regular basis in America.
When the Intergovernmental Panel on Climate Change (IPCC) was arguing convincingly in favour of reducing the greenhouse gas and a greater role on the part of the rich and industrialised nations in the matter, the rich nations pretended not to be convinced enough of the merit of this suggestion. They are yet to respond as positively as the situation demands to the call of extending fund and technology to poorer and vulnerable nations to devise strategies for adapting to a large-scale climate change. Now, they themselves are at the receiving end. Climate appears to be exacting a revenge on them because they could not care less about the possible disaster on account of their fouling air and encroaching upon the constituents of the planet's geomorphology.
Mohenjodaro and Harappa offer a lesson for the present civilisation. At least inhabitants of that period did not have the capacity to explode atomic bombs and manufacture nuclear arsenals. Yet they perished because there was a major change in climate. Climate is fast changing now and human contribution to the change for worse is far greater than that of the inhabitants of Mohenjodaro and Harappa. So the backlash from Nature might be many times more devastating than it was then. Already the signs are looking highly alarming. One would not be surprised if it turns out to be of cataclysmic proportion. Unwittingly, this present civilisation at its zenith may be hastening the process of inviting what is known as an apocalypse.