There are other larger threats.  Terrorism by Daesh is undoubtedly a threat to the West. It is however a minor one. The largest security concern should still be the small chance of complete destruction by nuclear weapons. Tensions with Russia make this more likely than at any time since the gold war. The Bulletin of the Atomic Scientists’ doomsday clock is set at 3 minutes to midnight in 1015 – it was last 3 minutes to midnight in 1984 at the height of the cold war before Gorbachev gained power in the USSR. [1]  Disasters are increasingly seen as an issue of national security and Climate Change is quite possibly an even greater threat as a result of the certainly of considerable warming and the resulting disasters it is likely to bring; by 2045 the Union of Concerned Scientists say that cities such as Atlantic City could face tidal flooding more than 180 times a year resulting in costly damage. [2]  [1] Bulletin of the Atomic Scientists, ‘Timeline’,   [2] Union of Concerned Scientists, ‘Encroaching Tides (2014)’,