The United Nations (U.N.) and Kofi Annan are Awarded the Nobel Peace Prize

In April 2001, he issued a five-point "Call to Action" to address the HIV/AIDS pandemic.

As Secretary-General, Annan saw this pandemic as a "personal priority" and proposed the establishment of a Global AIDS and Health Fund in an attempt to stimulate the increased spending needed to help developing countries confront the HIV/AIDS crisis.

On 10 December 2001, Annan and the United Nations were jointly awarded the Nobel Peace Prize, "for their work for a better organized and more peaceful world".

During the build-up to the 2003 invasion of Iraq, Annan called on the United States and the United Kingdom not to invade without the support of the United Nations. In a September 2004 interview on the BBC, Annan was asked about the legal authority for the invasion, and responded, "from our point of view, from the charter point of view it was illegal."

No one has done more than Kofi Annan to revitalise the UN. After taking office as the UN's seventh Secretary-General in January, 1997, he managed in a very short time to give the UN an external prestige and an internal morale the likes of which the organization had hardly seen in its over fifty-year history, with the possible exception of its very first optimistic years. His position within the organization has no doubt benefited from his having devoted almost all his working life to the UN. Experience in a bureaucracy is not always the best springboard for action and fresh approaches to the outside world, but Annan has brought about both. The UN structure has been tightened up and made more efficient. The Secretary-General has figured prominently in the efforts to resolve a whole series of international disputes: the repercussions of the Gulf War, the wars in the former Yugoslavia and especially in Kosovo, the status of East Timor, the war in the Congo, and the implementation of the UN resolutions concerning the Middle East and "land for peace".