A.) What is perceived to be the main role of the UN today?
b.) According to its 1945 Charter, what is supposed to be the main role of the UN?
c.) What would be the effects of eliminating or restructuring the UN?
A) The main role of the UN today seems to be perceived as one of conflict resolution at the Security Council level.
Matters are referred to the UN SC that can result in sanctions against countries that are in violation of international law, or even endorsement of military actions against such countries.
The UN also does a large amount of work in terms of aiding in elections (monitoring, advising, etc.)and humanitarian outreach (aid to refugees, etc.).
Via the General Assembly, the UN provides an open forum for any country to promote its views, agenda, complaints, etc.
B) According to the UN Charter's preamble, it's main functions were intended to be:
1. to save succeeding generations from the scourge of war, which twice in our lifetime has brought untold sorrow to mankind, and
2. to reaffirm faith in fundamental human rights, in the dignity and worth of the human person, in the equal rights of men and women and of nations large and small, and ...
The solutions provides insight on the United States - its hierarchy, political system, organizational mechanics, structure and history to aid the student in tackling the questions presented in the original post (see problem).