It is said that if you know your enemies and know yourself, you will not be imperiled in a hundred battles; if you do not know your enemies but do know yourself, you will win one and lose one; if you do not know your enemies nor yourself, you will be imperiled in every single battle.
Sun Tzu The Art of War

The gun has played a critical role in history. An invention which has been both praised and denounced... served hero and villain alike... and carries with it moral responsibility. To understand the gun is to better understand history.
Tales of the Gun