In October 2006 a 32-year-old milk truck driver barricaded himself in an Amish schoolhouse in Pennsylvania and shot 10 young girls execution style before putting his nine-millimeter pistol to his head and pulling the trigger.
The crime shocked America, but what came next was perhaps more stunning. Within days grieving parents reached out to the widow of the killer, offering forgiveness and financial assistance.
A new University of British Columbia study suggests that just by reading about such an extreme act of human goodness, you are now primed to be better to others - at least temporarily.
