As it says on the tin, ladies and gentlefish. What happens to Europe, and to the rest of the world, if France wins the Franco-Prussian War? What if, for example, French political and military leaders had not balked at the costs necessary to upgrade the French Army's artillery? Let's suppose French military leaders had been more inclined to accept the importance of mobility and concentration of troops and artillery.
What sort of short-term and long-term political, social, and military consequences result from a Prussian defeat at French hands?