A decent amount.
I started off as a NatSec adjacent staffer and have helped build Cybersecurity and Defense Tech companies, so a lot of my peers and friends are working directly on US-China, US-Russia, Israel-Iran, Saudi-Iran, Saudi-Turkey, India-Pakistan, and India-China relations.
These are all relations that could explode into cataclysmic wars (and have already sparked or exacerbated plenty of wars like the Syrian Civil War, Yemen Civil War, Libyan Civil War, Ethiopian Civil War, Russia-Ukraine War, Myanmar Civil War, Afghan War, etc). We are already going through a global trend of re-armament, with every country expanding their conventional, nuclear, and non-conventional warfighting capabilities. Just about every nuclear state has the nuclear triad or is in the process of implementing a nuclear triad. And China's nuclear rearmament race has forced India to rearm which has forced Pakistan to rearm, and is causing a bunch of regional arms races.
I think the world is more likely to end due to bog standard conflicts escalating into an actual war. Not some sort of AGI/ASI going skynet