Just a little bit of brainstorming: France has lost the battle of Waterloo, Napoléon is sent into exile on St. Helena and Louis XVIII has returned to France.
How can France be more successful in the new century? Can it keep up with industrialization without being overtaken by Great Britain, Germany and the United States? Can it, along with the United Kingdom, be a first rank world power, or is it restrained to be just one of several European great powers?