But, violent people aren't fearless. They are violent because they are scared. (Even the war hero is terrified when put in a position of having to do something heroic. It's that very fear that gives that individual a chance of surviving. It makes them alert.) So, most of us are not violent or fearless, and in 99.999% of cases we don't need that kind of primitive skill. We need social skills, the integrity to earn the respect of others, the ability to use words to solve problems. If you think you need those more primitive skills, then focus on how to live among more civilized people, and make a plan to do just that, even if it takes a few years.