Do you think that it is possible to stop the war?
Do you mean wars that involve weapons, people shooting each other? Yes, at some point a large-scale war will mean the end of humanity because weapons will be so advanced and destructive to the point it will blow up the entire earth. So, yeah even a madman would think twice to push the nuke button.
Anyway, I think the future wars would be in the case of information, economy, and tech wars. Whoever gets the upper hand will practically rule the world even if the border doesn't change.
Financial and technological wars are ongoing and will continue in the future. However, no harm of life occurs in this war. But when there is a war of arms, there will be great disaster. This arms war will never end because the countries that depend on the arms trade will always use new technologies to develop more deadly weapons and war is necessary to sustain that arms trade. I understand that this war will only end when the superpower countries reduce their dependence on the arms trade.