Young people - with their dynamism, their energy and their inherent understanding of our interconnected world - have much to teach us. Increased educational attainment, advances in technology and the spread of information have made this generation the best educated, most connected and most informed in history

I think over time you learn to know a bit more about yourself - you develop a certain amount of self-insight and self-awareness, and you know what you can absorb, and what you cannot; what gets to you and what doesn't.

After the end of the cold war, everybody thought, fantastic, finally the UN may be able to do what it was originally set up to do without big power divisions. It would be easy to get them to come together to resolve things. You will recall, on the first Gulf war, you almost got a unanimous resolution and a very solid coalition.

The United Nations, whose membership comprises almost all the States in the world, is founded on the principle of the equal worth of every human being.

Sometimes when you take a tough action against one side in the conflict, they see you as part of the conflict and they attack you.

Contrary to popular belief, we do not face a choice between economy and ecology, It is often said that protecting the environment would constrain or even undermine economic growth. In fact, the opposite is true: unless we protect resources and the earth's natural capital, we shall not be able to sustain economic growth.

In all these cases, part of the reasons for failure perhaps was not analyzing and assessing the true nature of the crisis, the resources that would be required, and exaggerated expectation of what the U.N. troops can do.