Charles de Secondat Baron de Montesquieu – The Spirit of Laws
One of the most important texts of the French Enlightenment. Interested in human progress, Montesquieu sought out larger laws of history that might explain why some countries are rich and others poor, why some have despotic governments while others use a lighter touch, and why social customs differ—and how this might affect future progress.
Montesquieu also offers a defense of free trade, which he called doux commerce, or sweet or gentle commerce. The theory is that trade and economic interdependence foster peace and prevent war, a sentiment U.S. Secretary of State Cordell Hull very much had in mind in attempting to rebuild post-Depression trade infrastructure and prevent World War III.
Montesquieu also offers an early version of the quantity theory of money. Finally, he in ludes lengthy narrative histories of Roman and French law.
If all that sounds a little scattershot, that’s because it is. The book almost has a stream of consciousness quality, as though Montesquieu, like Montaigne before him, simply wrote down whatever arguments and facts he had in his head as he sat at his desk.