What does Rousseau mean by natural goodness, and in what sense can natural man be said to be good?Discuss

PROMPT :
In Note IX to his Discourse on Inequality, Rousseau claims he has proved that “man is by nature good.” What does Rousseau mean by natural goodness, and in what sense can natural man be said to be good? Be sure to identify the foundation of natural goodness as Rousseau understands it.