you probably think he created the concept of the "Noble Savage," right? Well, you'd be wrong! OK, but at least he was behind the idea, right? Anti-civilization, wasn't he? Sorry: "Rousseau argued that in a State of Nature men are essentially animals and only by acting together in civil society and binding themselves to its laws, do they become men. For Rousseau only a properly constituted society and reformed system of education could make men good."
The whole association of Rousseau with the "Noble Savage" and the claim that he was "anti-civilization" were smears against Rousseau by a 19th-century racist. Now, this is known well enough that it makes it into a Wikipedia page; yet, even in recent times, some people who pretend to be writing on the history of thought have continued to perpetuate this smear.