Hence he imagines false or seeming motive forces".[25] Because the ruling class controls the society's means of production, the superstructure of society, the ruling social ideas are determined by the best interests of the said ruling class. In The German Ideology, "the ideas of the ruling class are in every epoch the ruling ideas, i.e. the class which is the ruling material force of society, is, at the same time, its ruling intellectual force".[26]