This World Must Die!

The girl clawed at Brecken's face as he raised the metal bar ...
Social living requires the elimination, or at very best, the modification of many elements necessary to survival in nature . And when an emergency arises, very often it is the person who would be considered a criminal , in other situations, who alone is able to cope with the necessities. If we manage to eliminate violence from human affairs, what will we find when a need for violence arises—a need outside of man's artificial control of his environment?
Feature Novelet of Dread Necessity
You have been chosen for this mission of murder because you are the only people in our culture who are capable of this type of violence. You have broken our laws, and this is your punishment!
Lou Phillips sat on the cold metal deck of the control room, seething with a growing dislike for the old man.
What you are here for, the other had told him when the guards had brought Phillips in, is a simple crime of violence. You'll do, I'm sure.
The old man paced the deck impatiently, while a pair of armed guards maintained a watchful silence by the door. Two more men in plain gray shirts and trousers sat beside Phillips, leaning back sullenly against the bulkhead. He guessed that they were waiting for a fourth, remembering that three other figures had been hustled aboard with him at the Lunar spaceport.
The door slid open, allowing another youth in gray uniform to stumble inside. One of the guards in the corridor beyond shoved the newcomer forward, and Phillips' eyebrows twitched as he had a closer look. This last prisoner was a girl.
He thought she might have been pretty, with a touch of lipstick and a kinder arrangement of her short, ash-blonde hair; but he lowered his eyes as her hard, wary stare flickered past him. She walked over to the bulkhead and took a seat at the other end of the little group.
The old man turned, scanning their faces critically. I am in charge of a peculiar project, he announced abruptly. The director of the Lunar Detention Colony claims that you four are the best he has— for our purposes !