The United Nations was established on Oct. 24, 1945, shortly after the end of WWII. As the war drew to an end, the nations that opposed Germany, Italy and Japan decided that such a war must never happen again. Representatives of these nations met in San Francisco in April 1945 and worked out an organization to help keep peace in the world. This plan was described in a document called the "Charter of the United Nations". In June 1945 50 nations signed the UN Charter. They were the first UN members and since then, more than 100 other nations have joined for a current total of 184 members. Communist China was accepted in 1971.
There is no doubt that it is in the best interest of the UN to have a worldwide ban on privately held firearms. But, and this is a big But, in the US we have the Second Amendment to the Constitution which is a tremendous hurdle to the UN for such a ban. US citizens should always remember this and let their elected representatives know in regard to any discussion of citizen arms bans.