Answer: This requires recognition of evil to which, if not everyone, then at least the main desires of humanity, the main Kelim (vessels), must come.
They do not have to be fully corrected, but they must reach the recognition of evil and yearn for connection between them so that the positive force that they intend to nurture between them will connect them.
Then all the wars in the world will stop. In the meantime, they are necessary to force humanity to yearn for the good. If it were not for wars, people would not feel that they need to connect in any way.
Indeed, evil is not really bad. It is simply an unfulfilled good that we are too lazy to fill.
From KabTV’s “Fundamentals of Kabbalah” 12/2/18