After years of globalisation, disaffected populations have lost confidence that the system is fair.

Trade policy can be a tool for change and progress.

To many American Jews, it is a truism that Barack Obama was the anti-Israel president. It was Mr. Obama who signed the Iran deal, which Israel portrayed as a mortal danger. It was Mr. Obama whose most contentious relationship with a foreign leader was with Prime Minister Benjamin Netanyahu.

As a child growing up during the Korean War, I knew poverty. I studied by candlelight.

Frankly speaking, I don't know much about rock music. But I enjoyed some when I was in college or high school. But I stopped listening after Elvis Presley!

Our work for human dignity is often lonely, and almost always an uphill climb. At times, our efforts are misunderstood, and we are mistaken for the enemy. There has been a clear erosion of respect for U.N. blue and our impartiality.

It is a sad but undeniable reality that people have died in the line of duty since the earliest days of the United Nations. The first was Ole Bakke, a Norwegian member of the United Nations guard detachment, shot and killed in Palestine in 1948. The toll since then has included colleagues at all levels.

All women and girls have the fundamental right to live free of violence. This right is enshrined in international human rights and humanitarian law. And it lies at the heart of my UNiTE to End Violence against Women campaign.

Climate change, in some regions, has aggravated conflict over scarce land, and could well trigger large-scale migration in the decades ahead. And rising sea levels put at risk the very survival of all small island states. These and other implications for peace and security have implications for the United Nations itself.

Businesses succeed when societies themselves succeed. When countries are affected by violence and the absence of the rule of law, business can and must be a messenger of peace.

One of the main lessons I have learned the last five years as Secretary-General is that the United Nations cannot function properly without the support of the business community and civil society. We need to have tripartite support - the governments, the business communities and the civil society.

In the Andes and the Alps, I have seen melting glaciers. At both of the Earth's Poles, I have seen open sea where ice once dominated the horizon.

Throughout human history, in any great endeavour requiring the common effort of many nations and men and women everywhere, we have learned - it is only through seriousness of purpose and persistence that we ultimately carry the day. We might liken it to riding a bicycle. You stay upright and move forward so long as you keep up the momentum.

Climate change does not respect border; it does not respect who you are - rich and poor, small and big. Therefore, this is what we call 'global challenges,' which require global solidarity.

The clear and present danger of climate change means we cannot burn our way to prosperity. We already rely too heavily on fossil fuels. We need to find a new, sustainable path to the future we want. We need a clean industrial revolution.

We need to tackle energy poverty.

One of the main lessons I have learned during my five years as Secretary-General is that broad partnerships are the key to solving broad challenges. When governments, the United Nations, businesses, philanthropies and civil society work hand-in-hand, we can achieve great things.

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.

We have reached a new milestone as a human family. With seven billion of us now inhabiting our planet, it is time to ask some fundamental questions. How can we provide a dignified life for ourselves and future generations while preserving and protecting the global commons - the atmosphere, the oceans and the ecosystems that support us?

Our planet's lands and oceans are already stretched to meet the demands of 7 billion people. The human population continues to grow. The search for sustainable solutions is an economic and a moral imperative if we are to create the future we want.

This Earth is our only home. Together, we must protect and cherish it.

Since I became Secretary-General, five years ago, I have seen youth participate at the United Nations as never before.

Personally, I do not know whether humankind is alone in this vast universe. But I do know that we should cherish our existence on this precious speck of matter... the greatest gift that could be bestowed upon us. For all practical purposes, there is only one planet Earth.

From the beginning of my time as Secretary-General, I have sought to advance a practical, action-oriented vision of the U.N. as the voice of the voiceless and the defender of the defenceless.