For years, the Pentagon has been saying that climate change is perhaps the biggest threat to American security of all. Back in 2004, a report commissioned by Pentagon defense adviser Andrew Marshall, the man behind the restructuring of the US military under Donald Rumsfeld, predicted that “abrupt climate change could bring the planet to the edge of anarchy as countries develop a nuclear threat to defend and secure dwindling food, water and energy supplies.” The report went on to declare that the threat to global stability posed by climate change was indeed greater than that of terrorism.