Discourse on the Origin and Basis of Inequality Among Men, also commonly known as the "Second Discourse", is a 1755 treatise by philosopher Jean-Jacques Rousseau, on the topic of social inequality and its origins. The work was written in 1754 as Rousseau's entry in a competition by the Academy of Dijon, and was published in 1755.

Jean-Jacques Rousseau was a Genevan philosopher (philosophe), writer, and composer. His political philosophy influenced the progress of the Age of Enlightenment throughout Europe, as well as aspects of the French Revolution and the development of modern political, economic, and educational thought.