Communication in Groups and Organizations

I found the Milgram Study covered in Cialdini's book to be very interesting. I have actually studied this concept in a couple other classes along with a video on the experiment. Though it is extremely humorous, it does bring about some serious points. I find this science to be most interesting when applied to war time. Soldiers are to obey no matter the situation and cost. In one of my classes we began to explore blind obedience (presented through the Milgram Study) through its application to the Nazi regime. Nazi soldiers and more so the majority of Germany believed superiors without question. This can be applied to various situations in life as well. Though the Milgram Study was covered extensively by Cialdini, I still question much of the psychology as to why people participate in blind obedience. I would hope I would question the authority in these types of situations. Can anyone shed some light on this subject? I believe blind obedience tends to stem from some sort of thought up reward system or motive to please people.