Change means movement. Movement means friction. Only in the frictionless vacuum of a nonexistent abstract world can movement or change occur without that abrasive friction of conflict.
Life is a corrupting process from the time a child learns to play his mother...
You do have to change things as warfare changes.
A man must live like a great brilliant flame and burn as brightly as he can. In the end he burns out. But this is far better than a mean little flame.