In my experience there is only one motivation and that is desire. No reasons or principle contain it or stand against it.
If to live is to progress if you are lucky from foolishness to wisdom then...
It evolved from my experience in the fifties growing up during the McCarthy...
The modern mind tends to be more and more critical and analytical in spirit hence it must devise for itself an engine of expression which is logically defensible at every point and which tends to correspond to the rigorous spirit of modern science.
