Dr. Nafeez Ahmed is a bestselling author, investigative journalist and international security scholar. He is executive director of the Institute for Policy Research & Development in London, and author of A User's Guide to the Crisis of Civilization among other books. His work on international terrorism was officially used by the 9/11 Commission, among other government agencies. He writes for the Guardian on the geopolitics of environmental, energy and economic crises on his Earth insight blog. Follow him on Twitter @nafeezahmed.