Dupont had a long history of analysing Australia’s position in the world. He was also a pioneer in the study of links between climate change and international security, an area that few defence experts had explored. In 2006 he asserted in an article, written with Graeme Pearman, that the security implications of climate change had been largely ignored by public policy experts, academics and journalists. ‘Climate change is fast emerging as the security issue of the 21st century,’ he wrote, ‘overshadowing terrorism and even the spread of weapons of mass destruction as the threat most likely to
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