Climate change, demographics, water, food, energy, global health, women's empowerment - these issues are all intertwined. We cannot look at one strand in isolation. Instead, we must examine how these strands are woven together.

Nuclear disarmament is the only sane path to a safer world.

A deal must include an equitable global governance structure. All countries must have a voice in how resources are deployed and managed.

We hold the future in our hands, together, we must ensure that our grandchildren will not have to ask why we failed to do the right thing, and let them suffer the consequences.

From the Balkans to Africa, from Asia to the Middle East, we have witnessed the weakening or absence of effective governance leading to the ravaging of human rights and the abandonment of longstanding humanitarian principles. We need competent and responsible states to meet the needs of "we the peoples" for whom the UN was created. And the world's peoples will not be fully served unless peace, development and human rights, the three pillars of the UN, are advanced together with equal vigour.

With her courage and determination, Malala has shown what terrorists fear most: a girl with a book.

Universal ratification of the Optional Protocol on the Involvement of Children in Armed Conflict will establish an international moral consensus that no child should take part in hostilities or be involuntarily recruited and that former child soldiers should be assisted by their governments after a life of violence and distress.