The beginning of the 20th century witnessed Wolrd war 1 ,the horror and tragedy of which devastated the world.Number of people became homeless and lost their lives.
there was an desire for an to the war and establishment of peace.the league of nations was founded for this purpose in 1919.
later on 14 august 1941 the British prime minister Winston Churchill and president Franklin Roosevelt signed the Atlantic charter which became the basis for the establishment of united nations.
the united nations began functioning with 51 nations as orginal memebers.It's headquarters areĀ in New York ,USA .