Why Wolverine Refused To Kill Anymore And Lived A Peacefull Life

Comic book: Wolverine: Old Man Logan 2009
Writer: Mark Millar
Artist: Steve McNiven

Fifty years ago, the villains formed an alliance and started a brutal war that led to the death of most of the heroes. In the end, the villains won the war, and the United States was divided among the strongest survivors like the Red Skull, the Hulk gang, Magneto, and even Doctor Doom.
Nobody knows what happened to Wolverine the day the heroes fell; he abandoned the name Wolverine, even married and had two kids, vowing never to use violence again.