We simply love Young and Minor, as they have always provided a fresh perspective. This piece of art dates back to war time, when mischievous artists, such as Young and Minor, tried to change the minds of the public. They didn't have the internet, but their message was still just as effective. In fact, it may have even been more effective since everybody used to read the same newspapers!
The reason it is called the 'Perfect Soldier' is because those ranked high in the military preferred mindless men who would follow orders. As you can see from the image, the soldier that is being selected has no head (and hence, no brain to think with). In a time when we needed soldiers to take a stand against war, those higher up wanted the exact opposite.