Kant’s moral outlook is also fundamentally determined by a subtle, shrewd, historically self-conscious (and characteristically Enlightenment) conception of human nature and human psychology that most treatments of Kantian ethics (even sympathetic ones) have largely overlooked. This side of Kant owes a great deal to Jean-Jacques Rousseau, and it belongs to a radical tradition in the social criticism of modernity whose later representatives include Johann Gottlieb Fichte and Karl Marx. The Kantian mistrust of our empirical desires reflects a Rousseauian picture of the way our natural desires have been influenced by the loss of innocence – the restless competitiveness – characteristic of human beings in the social condition, especially as found in the social inequalities of what Rousseau and Kant called the “civilized†stage of human society but was later renamed “modern bourgeois society†or “capitalism.†Again, to miss this continuity is not only to misread Kant; it is badly to misread the history, and even the living reality, of the social order that is all around us.
Jean-Jacques Rousseau