IT IS MARX AND I, IN PART, WHO MUST BEAR THE RESPONSIBILITY FOR THE FACT THAT, SOMETIMES, YOUNG PEOPLE GIVE MORE WEIGHT THAN IT IS DUE TO HIM ON THE ECONOMIC SIDE. IN THE FACE OF OUR ADVERSARIES, WE HAD TO EMPHASIZE THE ESSENTIAL PRINCIPLE DENIED BY THEM, AND THEN WE DID NOT ALWAYS FIND THE TIME, THE PLACE, OR THE OPPORTUNITY TO GIVE THEIR PLACE TO THE OTHER FACTORS THAT PARTICIPATE IN THE RECIPROCAL ACTION. BUT AS SOON AS IT CAME TO PRESENTING A SLICE OF HISTORY, THAT IS, MOVING ON TO PRACTICAL APPLICATION, THINGS CHANGED AND THERE WAS NO ROOM FOR ERROR.