Self control must develop, empathy must develop, logical thinking must develop, creative problem solving must develop... if we are the see the last of the violent behaviours gone from society. All of this is in the prefrontal cortex and this is best developed in a cooperative and loving society - something only the Love-Nexus can never deliver.
The violent rage, the "hulk smash" mode, can be switched off forever by dependable love and a removal of the dog-eat-dog elements of our societies.
When we love we protect, and then the violent ways are allowed to come forwards as the actions of a hero. For what is directed by real love will always be on the right track, and what is directed by fear or vice will always be lost.
"Violent" is the symptom of an underdeveloped prefrontal cortex, and a reason to seek the kind of wisdom that develops the higher capacities we are all born to build as we mature.