In societies under the rule of exploiting classes, there are various kinds of mental workers. Some are wholly in the service of the reactionary ruling classes and thus stand in an antagonistic relationship to manual workers. But even in such a situation, as Lenin said, many of the intellectuals engaged in scientific and technical work are themselves not capitalists but scholars, even though they are filled with bourgeois prejudices. The fruits of their work are used by the exploiters, but in general this is determined by the social system and not by their own free choice. They are totally different from those politicians who rack their brains for expedients of direct service to the reactionary ruling classes.