Richard Dawkins has an article in this month's Prospect magazine which is well worth reading, if nothing more than for its unique literary approach. In it he argues, that Gerin oil, a highly addictive drug, was responsible for many of the world's worst calamities, including September 11th, the Salem witchhunts, and many very bloody wars.
If you haven't heard of Gerin oil before, try reading the piece a second time. Make sure to "free your mind."