Heterodox economics movement

Some economists today speak of a heterodox tradition in economics. It is "heterodox" in that it is contrary to mainstream economics, and arguably began when Jean-Jacques Rousseau, a Swiss political philosopher of the Enlightenment and purported father of the French Revolution, wrote his book Discourse on Political Economy (Economie Politique) (1755), which became the entry on the subject in Diderot's Encyclopedie.