Whose famous book is The Social Contract?

Russo is correct answer.Key Points

• Rousseau authored the book "The Social Contract." The democratic concepts proposed by Rousseau in his book affected the members of the Third Estate.
• Jean-Jacques Rousseau was a major theorist during the Enlightenment in eighteenth-century Europe. 
• His first significant philosophical work, A Discourse on the Sciences and Arts, was the winning entry in the Academy of Dijon's essay contest in 1750. 
• Rousseau argues in this essay that the advancement of science and the arts has corrupted virtue and morality. 
• This discourse brought Rousseau acclaim and notoriety, as well as laying much of the conceptual framework for his second, lengthier book, The Discourse on the Origin of Inequality.

 Additional Information

• Voltaire, François-Marie Arouet (1694-1778), was a French Enlightenment writer, philosopher, poet, dramatist, historian, and polemicist. Only the quantity of his literary production rivals its diversity: the edition of his complete works, which is nearing completion, will include nearly 200 volumes.
• Although Voltaire's brilliance as a philosopher is self-evident, the specific originality of his thought and writings is more difficult to determine.
• The Spirit of Laws is Montesquieu's most famous work, in which he considers the impact of climate on society, the separation of governmental authorities, and the need for checks on a powerful executive office.
• His contributions to political philosophy, particularly the concept of separation of powers, created modern democratic government. 
• The Spirit of the Laws is a political philosophy work written by Montesquieu and originally published anonymously in 1748.