Violence justified?

Note:
-violence causes more violence (e.g. media violence)
- rebuttal to the above: violence actually leads to less violence as it is a means of discipline (think corporal punishment by parents, school and the court) and can be used to regulate and deter violent behaviour
-counter-rebuttal to the above: but too much violence becomes a kind of abuse and infringement of rights

Sample Qn:
Is violence ever justified? (Cam. 2012)

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