Disobediance of Lord's established rules causes war

Not a blade of grass moves without the will of the Lord. Whenever, therefore, there is disobedience of the established rules enacted by the Lord, there is war between men and nations. The surest way to the path of peace, therefore, is dovetailing everything to the established rule of the Lord. The established rule is that whatever we do, whatever we eat, whatever we sacrifice or whatever we give in charity must be done to the full satisfaction of the Lord.

(SB 1.15.24 - Purport)