One of my earliest memories is walking up a muddy road into the mountains. It was raining. Behind me, my village was burning. When there was school, it was under a tree. Then the United Nations came. They fed me, my family, my community.

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.

I spend most of my time in South Korea but at least one-third of my time is spent traveling around the world, meeting people, speaking about climate change and sustainable development and trying to foster global citizenship especially for young people. What I observe is there clearly is a need for global citizenship. That is exactly right. We are having troubles around the world. We need global vision.

Terrorism is a significant threat to peace and security, prosperity and people.

We must turn the greatest collective challenge facing humankind today – climate change – into the greatest opportunity for common progress towards a sustainable future.

Saving our planet, lifting people out of poverty, advancing economic growth... these are one and the same fight. We must connect the dots between climate change, water scarcity, energy shortages, global health, food security and women's empowerment. Solutions to one problem must be solutions for all.

The power of the leader is given to him by the people, so he has a duty to engage and listen more attentively and carefully to the aspirations of the people.