If it fails, world temperatures in the coming decades are likely to exceed 2 degrees Celsius (3.5 degrees Fahrenheit), the maximum amount most scientists believe the Earth can endure without experiencing irreversible climate shocks, including soaring temperatures and a substantial rise in global sea levels.

A failure to cap carbon emissions guarantees another result as well, though one far less discussed. It will, in the long run, bring on not just climate shocks, but also worldwideinstability, insurrection, and warfare. In this sense, COP-21 should be considered not just a climate summit but a peace conference — perhaps the most significant peace convocation in history.

To grasp why, consider the latest scientific findings on the likely impacts of global warming, especially the 2014 report of the Intergovernmental Panel on Climate Change (IPCC). When first published, that report attracted worldwide media coverage for predicting that unchecked climate change will result in severe droughts, intense storms, oppressive heat waves, recurring crop failures, and coastal flooding, all leading to widespread death and deprivation. Recent events, including a punishing drought in California and crippling heat waves in Europe and Asia, have focused more attention on just such impacts. The IPCC report, however, suggested that global warming would have devastating impacts of a social and political nature as well, including economic decline, state collapse, civil strife, mass migrations, and sooner or later resource wars.

Available at: http://www.huffingtonpost.com/michael-t-klare/why-the-paris-climate-summit_b_8461554.html