As far as UN's failure is concerned, if we see that behind the UN the super power USA has an effective impact in order to make any decision. If we see in past all things were firstly decided and then the things are mentioned in UN for international documentation. It would not be false to say that US is the power which is running the UN because the most of financial assistance are provided by US. Besides, before UN the US was also had super authority over the world. But, after getting source of UN the USA has become more power full. As far as UN's working goal is concerned, no doubt that UN has been working effectively in certain sphere, such as in Health sector, financial assistance, and other social programmings are the best works which have been done by UN. But, the main and major issue is peace that is the main motto of UN's organization. As a matter of fact, it can be seen that the UN has not been doing any affective work in order to make the world peaceful owing to hurdle of US veto power. It would not be false to say that the US has been protecting her self interest by doing veto. So, with the sum up it can be said that the US is the hurdle on the of UN.