With nuclear weapons in their power nuclear warfare would not be unpredictable. How would we know they wouldnt use these weapons to trigger a global war? It would be completely irrational to permit every state to have nuclear weapons. There would be no way to guarantee that these weapons wont end up in the wrong hands. With the great levels of human emotion and impulse the urge to blow up our planet completely would be far too high and would deem permitting these nuclear weapons completely irresponsible. Lets take North Korea for example. Countries such as North Korea are thought of as ticking time bombs that feel the need to prove themselves to the global community with use of weapons. Many are too unstable to hold a weapon with such a great magnitude of destruction.
There is no doubt that with every country possessing nuclear weapons the world would be far more war prone. I think the belief that possession of nuclear weapons by every state would create a peaceful world is very illogical. In the article The Spread of Nuclear Weapons: More May Better Kenneth Walsh writes, They make the cost of war seem frighteningly high and thus discourage states from starting any wars that might lead to the use of such weapons. Nuclear weapons have helped maintain peace between the great powers and have not led their few other possessors into military adventures.
I disagree with the belief that the expense of nuclear powers would keep states from using them thus promoting peace.. Although todays states in possession of these weapons may not have used them that doesnt mean states in the future wouldnt use them had they been permitted to. Though the cost of war may rise and may cause a slight decrease in its occurrence because the cost may exceed the gains, I dont think that is a reasonable reason to believe those in possession would not use them. Overall, I do not see any rational reason to believe that world peace would be promoted by permitting every state to have nuclear weapons.