Impossible. You can only deter and mitigate risk. But war is in our nature. War is uniquely human because it requires at least one civilization to wage.
The only way to stop war on Earth is to convince everyone here to go to war somewhere else.
So my plan is to militarize the school systems, manual military or scientific service at 18, create a federated republic under an international parliament, nationalize systems and get away from “profit” in exchange for progress, and go to war with the unknown to find “God” or whatever. Everyone who cant/wont can get UBI and healthcare and education a plenty, create art to their hearts content and do the “culture” thing.
Ad revenue was the Pandora’s Shit Box that has opened up the fall of capitalism. Can i just watch ads all day while i work my shit job instead so I can have a fucking life, Mr Corporation?