My wife is incarcerated and recently went in front of the parole board to hear the conditions of her release. During the hearing they brought up her past history of abuse and acknowledged that while severe, some people have similar if not identical backgrounds and do not commit a crime. Their question to her was, "Why did you commit your crime while others, with similar backgrounds, do not?" Her lack of a satisfying answer was taken of proof of her unremorsefulness and, despite her sentence being complete, she was refused release; they will reconsider in two years at which point she will face the same question.
It may be germaine to point out that my wife never brought up her past as defense for her actions though her past came to light in the investigation.
I have two questions. First: How on earth do they expect her to answer that question? I suspect that psychiatrists and philosophers would struggle and come up with wildly different hypothesis's - how could a lay person? Second: Why, in your opinion, do some people respond differently to similar upbringings?