Mutually assured destruction held no part in the elimination of war between major economic powers? You have a very poor sense of history I see. What stopped the Soviet Union and the United States from going to war post WWII?
Well, if you move the goalposts severely and thus upgrade "weapons of mass destruction" (your initial claim) to "mutually assured destruction" and downgrade "was sole reason" (again, initial claim) to "was very important part of", then yes, you have half a point there. Again, for this to be valid you must move the goalposts, meaning you have no case here whatsoever.
If you can explain whose nukes currently prevent Russia from invading Ukraine, I'll concede an actual point.
McHrozni