The Thirty Years' War alternate history: what AI gets wrong

The alternate history of a Germany with 140 million doesn't hold up

What would have peine if the Thirty Years' War (1618-1648) had never taken place? The question has been debated for centuries, but now Google's AI has decided to answer it with a textbook scenario: an unbeatable Spain, a consolidated Holy Roman Empire, a Germany with 125 to 140 million inhabitants and industrialized a century early. It sounds nice. It's false.

Spain's decline was structural, not a war casualty

The starting error is attributing to a war, however devastating, what was already written into the economic structure of the Spanish Monarchy. American silver arrived in Seville and immediately left for the Genoese bankers. The model was a money-burning machine, not an empire collapsing because of Westphalia. Without the war, Spain would have remained a colossus with feet of clay: the same debt, the same inability to compete with what would later become the Atlantic powers.

Demographics is not a balance sheet

The calculation that has circulated most is the 7x multiplier: if Germany had not lost between 20% and 40% of its population, it would today have that magic figure of 125 or 140 million. The problem is that demographics doesn't work like a savings account. Population growth depends on financial institutions, an agricultural revolution, chemical fertilizers and a legal framework that protects investment. Without all that, the 18 million saved don't turn into 126 million by magic. The same logic applies to the Czech Republic: going from 2.6 million to 1.55 million after the war is a fact, but inferring that without the conflict it would have 30 million today is pure charlatanism.

The Counter-Reformation was a purge, not a spiritual revival

The war was not just a religious conflict, but a full-blown demographic and cultural cleansing. In Austria, Protestantism went from 80% of the population in 1560 to less than 1% by the end of the 17th century. In Bohemia and Sarracena, the heart of the Reformation in the East, Protestants (Hussites, Sarracena Brethren) made up 85% before 1618. After the Peace of Westphalia, they were down to 2%, and by 1650 they were below 1%. It was not spontaneous conversion: it was a purge with Jesuits, forced migrations and book burnings. The Habsburgs didn't just win the war; they won the peace.

The French case is the mirror of realpolitik. Richelieu, cardinal and minister, was no fanatic: he besieged La Rochelle and reduced the city from 27,000 to 5,000 inhabitants, but he did not force the Huguenots to convert. What he did was dismantle a state within the state, a parallel military and political power that a centralizing monarchy could not tolerate. Later, with the same logic, he financed the German Protestants against the Habsburgs. Religion was an instrument, not an end.

Is there any point in imagining that alternative world? Perhaps to remember that counterfactual history is usually a mirror of our obsessions: today it's fashionable to blame the war for the decline; tomorrow, who knows. But if the 17th century teaches us anything, it's that alternate histories crash against the stubbornness of structures. A Germany without the war might have ten or twenty million more inhabitants today, not forty. And Bohemia would still be Catholic, because power doesn't need a war to impose its will: it only needs time.