“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.”

For my generation, coming of age at the height of the Cold War, fear of nuclear winter seemed the leading existential threat on the horizon. But the danger posed by war to all humanity-and to our planet-is at least matched by climate change.

Millions of people in nearly 80 countries still live in fear of landmines and explosive remnants of war, which take an unacceptable toll on lives and limbs, and people’s livelihoods

I call for the need of world leaders to address climate change and reduce the increasing risk of disasters- and world leaders must include mayors, townships and community leaders.

Now, more than ever, we need to connect the dots between climate, poverty, energy, food and water. These issues cannot be addressed in isolation.

The taking of life is too absolute, too irreversible, for one human being to inflict on another, even when backed by legal process. Where the death penalty persists, conditions for those awaiting execution are often horrifying, leading to aggravated suffering.

Nuclear terrorism is one of the most serious threats of our time. Even one such attack could inflict mass casualties and create immense suffering and unwanted change in the world forever. This prospect should compel all of us to act to prevent such a catastrophe.

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

Nothing is more shameful than attacking sleeping children.

It is but a short step from hunger to starvation, from disease to death.

Sustainable development is the pathway to the future we want for all. It offers a framework to generate economic growth, achieve social justice, exercise environmental stewardship and strengthen governance.

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.

National boundaries these days are not that important because of transformative technological development. Now we are talking about the fourth industrial revolution.

Climate change…is, simply, the greatest collective challenge we face as a human family.

We have all heard of the web of life. The way we live threatens to trap us in a web of death.

You have to take ownership and leadership of tomorrow. For that to be possible, you have to strengthen your capacity and widen your vision as a global citizen.

The future of any leader or political systems is to be determined by the people of the country.

The key to high-quality communication is trust, and its hard to trust somebody that you dont know.

Basically, for any complex to be sustainable needs to have a balance between two factors: resilience and efficiency. These two factors can be calculated from the structure of the network that is involved in a complex system.

I quickly convinced myself that the true key to material happiness lay in a modest standard of living which could be achieved with little difficulty under almost all economic conditions.

That’s the whole key to anything: Don’t be afraid to fail. And is not afraid to fail.

Relationships are the key element to Press & PR

The key to freedom is accepting my own autonomy as an individual, and respecting the autonomy of other individuals, with all of what that means – whatever that means.

The key to a sale in an interview, and the key to an interview is a disturbing question.

A key thing in being a leader is you’ve got to pause yourself.