"Those who have done the thinking will at the moment of crisis be ready to invoke the decisions they have long since made. The capacity to say them nay depends not alone on the enjoyment of higher authority, but much more on the possessions of an alternative idea." -- Bernard Brodie
I took a class on nuclear weapons and their implications from Bernard Brodie at UCLA way back in the day, and was im[pressed with the rigor and breadth of his thinking. This quote may in part explain why.