Say it's 100-200 years in the future and your 25 years old.
We've contained nukes somewhat, part because nukes are so hard to make and in part because the international community is fighting their spread. At one time they tried to contain battleships if I recall correctly.
Small pox and chemical weapons are contained somewhat.
Will some group like ISIS be able to easily acquire a weaponized AI and let it loose on the world? Will AI be easier to acquire? Some grad student can put it on an advanced 5 petrabyte USB thumb drive and smuggle it out of the lab?
Elon Musk told a bunch of US governors that AI is a existential threat and needs to be regulated the other day.