Hard to tell. If you ask me, I think that if the invention of modern warfare happened before the Thirty Year's War and the subsequent Peace of Westphalia (which

Hard to tell. If you ask me, I think that if the invention of modern warfare happened before the Thirty Year's War and the subsequent Peace of Westphalia (which created the modern West as we know it) then the Thirt Year's war would have been a lot bloodier and more violent, not unlike the current tribal wars in Africa but on the scale of the World Wars. Eventually someone would have won it but the West would have became a lot weaker than it is (due to the destruction and death toll), making the world a lot more multipolar. This is, of course, worthless crystal ball history, but that's my two cents.