(update 1: 26 July 2011)
(update 2: 29 November 2011)
(update 3: 21 December 2012)
(update 4: 24 August 2012)
Sherlock Holmes once remarked that it was a capital mistake to theorise in the absence of data. There are few settings where this is more accurate than in attempting to understand the psychology of another human being.
Nonetheless the intense interest surrounding the tragic events in Norway has prompted much speculation on what may have motivated Anders Behring Breivik to carry out mass murder.