  In Part I of the Second Discourse, Rousseau’s focus is slightly different and occurs in the context of a polemic against philosophers (such as natural law theorists like Condillac) who attribute to primitive human beings a developed capacity for abstract reasoning. Rousseau proposes need as the cause of the development of language, but since language depends on convention to assign arbitrary signs to objects, he puzzles about how it could ever get started and how primitive people could accomplish the feat of giving names to universals.