Climate shift has at times been fingered as a culprit in triggering conflict, fuelling for instance the 1789 French Revolution by wrecking harvests and driving hungry peasants to the city.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/study-establishes-climate-trigger-conflict
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/business-recorder-pakistan
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/conflicts
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/famine
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/africa
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/el-nina
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/global-warming
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-impacts
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/australia
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/asia
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/natural-disasters