In fact, human-induced climate change is already taking place and it’s not very difficult to find press warnings of climate change causing violent conflict. The question is: is the world facing a new era of war?
The Past
Researchers from the Department of Geography at the University of Hong Kong reported, in July 2007, that cool periods in China and the resulting scarcity of resources, such as shrinking agricultural output, are closely linked with a higher frequency of wars over the past 1000 years.
- War frequencies showed a cyclic pattern that closely followed the global paleotemperature changes.
- Reduction of thermal energy input during a cold phase would lower the land carrying capacity in the traditional agrarian society, and the population size, with significant accretions accrued in the previous warm phase, could not be sustained by the shrinking resource base.
- War frequencies varied according to geographical locations (North, Central and South China) due to spatial variations in the physical environment and hence differential response to climatic change.
The research shows that human population increases and collapses were correlated with the climatic phases and the social instabilities that were induced by climate changes during the last millennium. The findings proposed a new interpretation of human-nature relationship in the past, with implications for the impacts of anomalous global warming on future human conflicts.
The Future
A 2003 report prepared for Pentagon years ago explored the
potential consequences of an abrupt climate change and concluded that it would create serious food shortages due to decreases in global agricultural production, decreased availability and quality of fresh water and disrupted access to energy supplies. This would result in large population movements and an escalation of global conflict.
The Present
Google Earth: Crisis in Darfur
This unprecedented online mapping initiative from the USHMM and Google Earth lets you visualize, better understand, and respond to the genocide in Darfur.
The conflict and resulting tragedy that have unfolded in Darfur since 2003 have taken the world headlines. The most common way of explaining the context was in terms of ethnic differences between Arabs and Africans. Actually, the Secretary General of the United Nations, Ban Ki- Moon, believes that we are already seeing in Darfur a violent conflict caused by climate change - "the Darfur conflict began as an ecological crisis, arising at least in part from climate change".
No conflict ever has a single cause. In the case of Sudan, the escalation of violence has been attributed to such factors as:
historical resentments and local perceptions of race;
demands for a fair distribution of power between dissimilar groups; unfair distribution of economic resources (Sudan is one of the most unequal countries in the world, with wealth and power concentrated in the capital);
disputes over access to and control of increasingly scarce land, livestock and water between pastoralists and agriculturalists;
small arms proliferation and youth militarisation; bad government agricultural policies and weak state institutions.
Thus climate change alone (or drought and land degradation caused by it) does not explain either the outbreak or the extent of the violence in Darfur. The other 16 countries in the Sahelian belt have felt the impact of global warming (including
Mali and
Chad), but only Sudan has experienced such devastating conflict.
Darfur is, in fact, an exemplary case showing how the physical consequences of climate change interact with other factors to trigger violent conflict, like the nature of power structures at the local, regional, national and international levels.
The
IPCC’s Fourth Assessment Report of 2007 shows that global warming will have global effects, varying in both kind and degree. Second the research for this report, the consequences of consequences of climate change include
a high risk of armed conflict in 46 countries with a total population of 2.7 billion people, and
a high risk of political instability in a further 56 countries with a total population of 1.2 billion - a total of 102 countries as being at risk of significant negative knock-on socio-political effects.
The 46 countries identified as facing a high risk of armed conflict have current or recent experience of armed conflict and additionally, particularly weak institutions of government and very poor economic performance.
Another example showing that environmental scarcities and massive population movements do not always result in violent conflict was
Malawi, which has been suffering from massive famine but no war has followed.
Also, the Asian tsunami of 2004 created huge refugee problems but did not lead to violent conflict. Why not?
Climate change - violent conflict [1]
The answer lies in “intervening variables”. Environmental scarcities do not directly cause violent conflict, but the outcome depends on social and political factors that impact on the potential for violent conflict - some variables increase and others decrease conflict probability.
Actually, we don’t know exactly what these factors are and how they influence the capacity to adapt to climate change. But the current understanding is that we are talking about 3 political and social characteristics:
1 - the deeper the divisions between ethnic and religious groups or between classes are, the more likely it is that environmental scarcity causes violent conflict.
2 - states with weak political institutions are particularly vulnerable, since they find it difficult to manage the social tensions caused by climate change.
3 - democracies are better able to protect the environment and manage peacefully the consequences of environmental degradation.
A better understanding of climate change requires an interdisciplinary knowledge in astronomy, physics, geology, chemistry and biology. The observations from Space are crucial for this, but the economic and social sciences also play a fundamental role. And effective solutions to this urgent problem only can be obtained in peace by international collaboration.
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