" Therefore, for Rousseau, the proposition that slaves may often be happier than free men does not begin to justify slavery, and for this reason he sharply and indignantly rejects utilitarianism of people like Helvétius. Slavery may be a source of happiness: but it is monstrous all the same. For man to wish to be a slave may be prudent, but it is disgusting, detestably degrading. "

― Isiah Berlin