Granted. The parts of the world you wish to be peaceful are now peaceful. Those that are not, however... they are constantly at war with one another. Eventually those countries become nothing but desolate wastelands, devoid of any life. You'd think that's fine, yes? Well, think about all the innocent lives, not just men, but women and children, that were killed because of this wish. Yes, there is peace, but can your subconscious live with knowing what happened to achieve that? I wish I wasn't allergic to anything.