Id Rousseau correctly argue that previous philosophers had not gone back far enough in search of the state of nature?

The essay topic is:
Did Rousseau correctly argue that previous philosophers had not gone back far enough in search of the state of nature?”

The course is called POLITICAL THEORY, and goes through the works of Hobbes, Locke, Rousseau, Paine, Wollstonecraft and Mill.

The essay should closely examine what Rousseau has said about Hobbes, Locke etc about the state of nature, and examine whether he was correct in arguing that their idea of the state of nature was not natural enough.