to undergo changes. The Party Committee must systematically check the distribution of members between different cells, check the expediency of the organization of the cell, carry out regrouping of the members of the cell in order in each separate case and at each concrete moment, to concentrate the best forces of the Party round the most important sectors of the front of the class struggle. In this lies the fundamental art of the Party organizer. His general task consists in seeing that every Party member as well as sympathizer should be constantly drawn into day to day work, attention being concentrated upon the most important sectors of the class struggle. 19. SHOCK GROUPS The practice of the Y. C. L. has recently given rise to the method of so-called shock groups or brigades. This method of shock brigades could be usefully carried over into the practice of the Party. The term “shock brigade” is not in itself very good. Shock brigades are organized in the factories in the U. S. S. R., the Communists working in the factories organizing shock groups around which non-Party workers are gathered. But the Communist Party is the advance guard of the working class, i. e., it is in itself _the_ shock group of the working class; to create within this shock advance guard of the working class yet other shock brigades is of course at bottom not correct. But this is what IS correct. In the Party organizations of capitalist countries, numbers of Party members are not drawn into the everyday work. Every Party member belongs to a cell, which meets once a fortnight or once a month, and in between these meetings Party members do not perform much Party work, in many cases, in fact, have no Party tasks at all. This happens because in the given cells at the given time, there is not much internal work, while other sectors of Party work may at the same moment have important militant tasks before them. It is for the Party Committee to keep on combining Party members into different groups for the concentration of forces upon the most important sectors. Having performed a given task such groups or brigades are broken up or reconstructed into other groups for taking up new work. The general aim in creating such groups should be the strengthening of Party work in the big enterprises of the most important sections of industry. Here, on this problem the full attention of the leading Party organs must be sharply directed in the near future. 20. WORK OF THE FACTORY CELLS IN THE ENTERPRISES