Sentence:  Yet , after <WSD>Rousseau</WSD> had given the social contract a new twist with his notion of the General Will , the same philosophy , it may be said , became the idea source of the French Revolution also . 
Meaning of the word marked with <WSD> tags:  French philosopher and writer born in Switzerland; believed that the natural goodness of man was warped by society; ideas influenced the French Revolution (1712-1778)