What is it about?

Climate change is as big an existential threat to humanity as nuclear war, and thus environmental security is now "high politics" in the changing practice and theory of security studies. We discuss the various ways so-called homeland security, national security, and environmental security overlap with each other in a conceptual Venn diagram, and why the distinctions among these areas are increasingly diminishing.

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Why is it important?

This shows more explicitly than others before it the many overlapping areas among environmental, national, and homeland security, based in part around the authors' Venn diagram. The intersection of all three we believe should be referred to as climate security

Perspectives

This is important because the climate crisis has not been sufficiently addressed as an all-eneompassing security risk.

Terrence M O'Sullivan
University of Akron

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This page is a summary of: Defining and Distinguishing Homeland from National Security and Climate-Related Environmental Security, in Theory and Practice, Journal of Homeland Security and Emergency Management, January 2015, De Gruyter, DOI: 10.1515/jhsem-2014-0003.
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