  Another source of revolutionary ideology that became the special target of Rehberg's wrath was physiocratic doctrine.  Though this doctrine was often associated with absolutism, Rehberg still saw it as a basic influence on radical thinking.  He especially disliked what he took to be the physiocrats' leading principle: that everyone should have the right to do whatever they want as long as they do not interfere with anyone else.  Such a principle laid down the path toward “a very crude egoism”.  If this were made the governing principle of civil society, he argued, then people would recognize no obligations other than to leave others alone; the whole culture of social virtue would disappear (25-26).  The physiocratic system also leads to materialism, he believed, because it values everything according to its utility, its ability to satisfy our basic needs.  People will regard themselves as machines, who work to eat and eat only to work more (27).  Since they show no immediate profit, there will be no point in developing our higher powers or in cultivating the arts (28).