Do you think it's the individual's responsibility to commit violence? to commit justice?

I don't think justice works at the individual level. It doesn't work much better at the mob level either. Having a system (even if it's a shitty system, like a priest or a king or trial by combat) at least sets some rules. Over time, those rules can get better or worse.

That system might be a tribe leader or a king or a war lords or a council of war lords or a group of elected people. But even with the gang leader ... you get a de-factor government of some kind. You might not think of it as such, but it is.

I think justice only works at the group behavior level. You need a social group to have that concept. I am for smaller systems, smaller states, smaller countries .. and I think we'd be much better off globally if the US had been allowed to split into two different self government entities back when it wanted a divorce.

But I don't think you escape the government. Those who do just end up forming another government.