That depends on what you mean by "proposed".
They were talking about it. They were planning to make it the law of the world.
John Bolton told them that if they tried to do such a thing, the United States would never be part of the treaty. So instead of proposing it, they whined bitterly about how mean we were.
Except, it did.
Here was John Bolton's speech telling them that the US would not be a part of their scheme:
GRIP, centre de recherche et d'information sur le désarmement, le commerce des armes, la prévention des conflits et l?économie européenne de la défense. GRIP is a Belgian independant organization for the research and information on geostrategic issues and international relations. GRIP mainly...
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John R. Bolton: Statement to the UN Conference on the Illicit Trade in Small Arms and Light Weapons in all its Aspects, July 9, 2001
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No, I was right. The UN was actively talking about coming up with a gun ban treaty.
John Bolton told them that they'd be doing it without the US.
Here is a quote from his excellent speech:
"We do not support measures that prohibit civilian possession of small arms. This is outside the mandate for this Conference set forth in UNGA Resolution 54/54V. We agree with the recommendation of the 1999 UN Panel of Governmental Experts that laws and procedures governing the possession of small arms by civilians are properly left to individual member states. The United States will not join consensus on a final document that contains measures abrogating the Constitutional right to bear arms. We request that Section II, para 20, which refers to restrictions on the civilian possession of arms to be eliminated from the Program of Action, and that other provisions which purport to require national regulation of the lawful possession of firearms such as Section II, paras 7 and 10 be modified to confine their reach to illicit international activities."
That is incorrect. The UN actually tried to do it.
And Snopes actively lied to cover it up.