Taking the words written by some the world's most evil mass killers as a starting point, this is an examination of the state of mind that leads young men to open fire and kill randomly. Before his shooting rampage at UCL during which six people were killed and 14 wounded, Elliott Rodger wrote: 'All those beautiful girls I've desired so much in my life, but can never have because they despise and loathe me, I will destroy. I will kill them all and make them suffer, just as they have made me suffer. It's only fair.'