I think of this as I watched a video about Oppenheimer by Veritasium on YouTube. He was the only person who regretted making the atomic bomb. About its impact on nature but more importantly, about its impact on innocent life. Not to dabble on politics, but war initially started as a conflict with humans. We started with our bare hands, then tools, then removing the humans from the equation. With that, we feel less and less remorse on the damage we do to other because the other side feels the same.
Is it war that will end conflicts? If so, I'd rather it was done by hurting each other physically facing eye to eye, than it be done by a man-made chemical reaction that no one can see.