It was the French Revolution that defined the stakes in modern war as an existential clash between nations in arms, in which fundamental principles of rule were in question. War was the world spirit on the march. That is what the German poet Goethe thought he witnessed at the Battle of Valmy in 1792, where a rag-tag revolutionary army unexpectedly turned back a much better-equipped counter-revolutionary invasion by royalist and Prussian forces. “From this day forth,” he wrote, “begins a new era in the history of the world.” Two days later, the French Republic was declared.
A “world-soul” on horseback is what Hegel thought he saw, as Napoleon cantered through the city of Jena in October 1806 on his way to the battle that would push the Prussian state to the brink of extinction. War was not simply a violent practice of princes, a duel writ large. War was History with a capital H – the “slaughter-bench”, Hegel would call it – “at which the happiness of peoples, the wisdom of States, and the virtue of individuals have been victimised”. It was something both fascinating and horrifying. Transformative and yet also on the edge of tipping over into absolute violence, as in the horrors of guerrilla war in Spain, depicted by Goya. Two centuries later, in the commentary on the war in Ukraine, one can feel the same spirit stirring.