One strength of the legitimacy of authority is that it can help explain how obedience can lead to real-life war crimes.
-In 1968, Lt. William Calley ordered American soldiers to murder over 500 unarmed innocent civilians in the Vietnamese village of My Lai. At trial, he argued that he was simply obeying orders from his commanding officer, who held rank and power over him in the structured Army hierarchy.
-This means the explanation has practical applications as if legitimacy of authority is a useful explanation, then there is a possibility to educate soldiers to challenge authority, in the hopes of preventing future war-crimes.