Consisting of 193 member states, the United Nations is a global organisation which strives for peace, dignity and equality on a healthy planet. Founded in 1945, it provides a forum for the world's nations to come together, discuss issues and find solutions, which transcend national boundaries. The UN has successfully ended conflicts across the world and has won the Nobel Peace Prize over ten times. However it has been criticized for the alleged abuse of power by nations, inaction and failure to prevent armed conflicts. So in a rapidly changing world – is the UN fit for purpose? Host Claire Graham talks to the BBC North America & UN correspondent Nada Tawfik about the structure, purpose and future of the United Nations.

Produced by Cathy Young for BBC World Service.