“Now this is the law of the Jungle –
as old as true as the sky;
And the Wolf that shall keep it may prosper,
but the Wolf that shall break it must die.
As the creeper that girdles the tree trunk
the law runneth forward and back –  
For the strength of the Pack is the Wolf,
and the strength of the Wolf is the Pack.”

The Law of the Jungle
by Rudyard Kipling