There is a new policy in question that researches have been supporting including Pifer which is a no nuclear weapons first policy. Franklin C Miler breaks down this policy as well as outlines history. Some believe that a “Sole Purpose” policy is necessary due to aging NATO policies and that pledging to not use nuclear weapons first would deescalate tension with China and Russia.

Touch Of Light / CC BY-SA (https://creativecommons.org/licenses/by-sa/4.0)