"Well," admitted Jubal, "so do I.  But it is not a matter of free choice for me, nor for you - nor for Mike.  All three of us are prisoners of our early indoctrinations, for it is hard, very nearly impossible, to shake off one's earliest training.  Duke, can you get it through your skull that if you had been born on Mars and brought up by Martians, you yourself would have exactly the same attitude toward eating and being eaten that Mike has?"