The Nuclear World War won’t be deliberately started, it will be a mistake caused by the type of military incompetence that produced the shoot down of the Ukrainian airline by an Iranian missile battery.
The traditional nuclear powers generally have affective controls, but the Pakistani nuclear forces is under the “control” of the ISI wackaddodles and I don’t need to say anything more about N Korea. Pakistan has a border with China and is inside China’s inner circle of interests.
A Pakistani first strike against India followed by a counter strike will inevitably drag in the rest of the world…..