All that is necessary for evil to succeed is for good men to do nothing as they must if they believe they can do nothing. There is nothing worse because the council of despair is declaration of irresponsibility; it is Pilate washing his hands.
Once the battle is lost, once our natural splendor is destroyed, it can never be recaptured. And once an can no longer walk-through beauty or wonder at nature his spirit will wither and his sustenance be wasted.