When was the United Nations founded?

The United Nations was founded in 1945, following the end of World War II. It was established with the aim of promoting international cooperation and preventing future conflicts. The creation of the UN was a response to the failures of the League of Nations and the need for a more effective institution to foster peace and security among nations. The UN officially came into existence on October 24, 1945, when the founding charter was ratified by the five permanent members of the Security Council and a majority of other signatory nations.

The other years listed do not align with the establishment of the UN. The year 1940 predates its founding and thus cannot be considered relevant. The years 1950 and 1960 are also incorrect as they are significant in other contexts—such as the Korean War and various decolonization efforts—but do not mark the inception of the United Nations. The establishment in 1945 is fundamental in shaping international relations and remains a key date in global history.