In the aftermath of the Second World War, 850 delegates from 50 nations gathered in San Fransisco, determined to establish an organization which would preserve peace and help build a better world. Over the last 75 years, the UN has committed itself to maintaining international peace and security, and promoting social progress, better living standards and human rights. But how did the UN come about? How effective has it been in maintaining peace in the world? And where might it have failed? Rob Weinberg asks the big questions about this important development in global affairs with the leading analyst of UN history and politics Professor Thomas Weiss of the City University of New York’s Graduate Center and Distinguished Fellow at the Chicago Council on Global Affairs.