I say yes, absolutely. We teach them accountability, as Ms. Monastesse said, but we also listen to what they have experienced to understand the why and how.
Prevention in schools is also important. Young people today are not educated about violence, and they see a lot of it around them. They see people in street gangs, for example. In many cases, people are violent out of fear; violence is a self-defence mechanism. Often, as they grow up, young people adopt violent behaviours to look cool, but these are not the right tools. I believe that, by building people's self-esteem, we free them from racism, aggression and many other problems. When we build strong human beings, they don't need to destroy others.
We have to work on both fronts.
However, according to the research I've done everywhere, there are currently no therapies available to men. I'm not talking about little workshops once a week. I'm talking about therapy that men have to undergo in closed custody. Believe me, if you put a bunch of violent men together, their behaviours will come out. Their egos and control issues will emerge, among other things, and the people there will be able to work on those behaviours. I still think that's the best way to go.