This is all about nature. Not just human nature, but nature itself, of which we are a part.
Urwumpe, it's one thing to want to improve yourself, but that means accomplishing more, not trying to overcome nature. What I mean by that is - changing your diet, improving your physical form, learning something new, being less lazy/working harder, getting a better routine going (could be anything, work related, exercise, morning/sleep, etc), caring more about those who are important to you/care about you, etc.
However, to sit there and claim that "violence is an abberation and must be eradicated", or that competition is bad, or that aggression is bad, etc, THAT is a problem.
The people we here in the states call liberals (not sure what you guys in Europe would call them, but I know you use "liberal" different than we do) are hippies, touchy-feely types who claim to love nature, but in fact only like trees but hate everything else about nature (because it's violent, cold, harsh and unforgiving, and decidedly "unfair"). They think they somehow know better than the very thing that gave them an existance in the first place.
That isn't to say that one should be out of control and hyper-violent. But it IS to say that violence and aggression are NOT the evil thing they are made out to be, and we as a society NEED to be more accepting of it. It's actually no wonder that crime is so bad today, we have no outlet, and video games just don't cut it. We need to bring back "the games" (just no animal sacrifices this time). We've taken away all outlets and ability to respond in appropriate manner, but left (even increased) the stress and pressures. It's a bad situation.