The Precipice sets out a number of longtermist policy ideas. These include:
Restart the Intermediate-Range Nuclear Forces Treaty (INF).
Renew the New START arms control treaty, due to expire in February 2021.
Take US ICBMs off hair-trigger alert (officially called Launch on Warning).
Does anyone know of projects working on this? Preferably ones which could use a modest donation (e.g. low 5-figure sum) to work on this sort of thing.
I’d suggest considering:
Arms control association https://www.armscontrol.org/
Nuclear Threat Initiative https://www.nti.org/about/global-nuclear-policy/
The Nuclear Threat Initiative works on this.
Also see:
https://www.openphilanthropy.org/focus/global-catastrophic-risks/biosecurity/nuclear-threat-initiative-projects-to-reduce-global-catastrophic-biological-risks
I don’t know much about them but I believe the British American Security Information Council (BASIC) support these policies in the UK (INF, hair-trigger).