There were many changes, some good and some not so good. The biggest positive change was the replacement of French feudal laws with the Napoleonic Code-a modern, simplified code of law that laid the foundation for much of modern European law (including much Louisiana state law here in the US). Otoh, the flower of French male citizenry was decimated by the endless series of wars, not unlike the carnage of World War-I, but here played out over nearly 20 years.