The Arab Awakening or Arab Spring has transformed the geopolitical landscape.

The U.N. might not be the most luxurious place to work, but it certainly is one of the most important places in the world.

Globalization is exposing new fault lines - between urban and rural communities, for example.

Climate change is destroying our path to sustainability. Ours is a world of looming challenges and increasingly limited resources. Sustainable development offers the best chance to adjust our course.

A world free of nuclear weapons will be safer and more prosperous.

When we put an end to nuclear tests, we get closer to eliminating all nuclear weapons.

We have a legal and moral obligation to rid our world of nuclear tests and nuclear weapons.

Nuclear tests poison the environment - and they also poison the political climate. They breed mistrust, isolation and fear.

Nuclear accidents anywhere can affect people everywhere.

Nuclear power plants must be prepared to withstand everything from earthquakes to tsunamis, from fires to floods to acts of terrorism.

The tragic nuclear accident at Fukushima underscored the urgent need to enhance nuclear safety and the international emergency response framework. I commend the International Atomic Energy Agency for its work.

Border strengthening is effective, but not if done in isolation. We also need to give priority to establishing public institutions that deliver a sustained level of security and justice for citizens. Border security can never come at the expense of migrants' rights. Nor can it be used to legitimize inhumane treatment.

Although more than 500 million maritime containers move around the world each year, accounting for 90 per cent of international trade, only 2 per cent are inspected. Strengthening customs and immigration systems is essential.

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

Every day, we at the United Nations see the human toll of an absence of regulations or lax controls on the arms trade. We see it in the suffering of civilian populations trapped by armed conflict or pervasive crime. We see it in the killing and wounding of civilians - including children, the most vulnerable of all.

The burden for achieving disarmament cannot be borne by peace groups alone. Everybody, regardless of age, income, profession, gender or nationality, has a stake in this quest.

People understand that nuclear weapons cannot be used without indiscriminate effects on civilian populations. Such weapons have no legitimate place in our world. Their elimination is both morally right and a practical necessity in protecting humanity.

Grave security concerns can arise as a result of demographic trends, chronic poverty, economic inequality, environmental degradation, pandemic diseases, organized crime, repressive governance and other developments no state can control alone. Arms can't address such concerns.

The Fukushima Daiichi nuclear disaster in March 2011 was an immense tragedy that sparked a global response. The international community came forward with aid to the victims and came together to address the broader concerns about nuclear security and safety.

Chemical weapons simply have no place in the 21st century. Progress in this vital area will help generate momentum to meet our goal of eliminating all weapons of mass destruction.

My U.N. five-point plan focuses on preventing proliferation, strengthening the legal regime, and ensuring nuclear safety and security - an effort that was given good momentum by the Nuclear Security Summit held in Seoul earlier this year. The world is over-armed, and peace is underfunded.

We are using resources as if we had two planets, not one. There can be no 'plan B' because there is no 'planet B.'

The human family is at a critical juncture. The world is moving through a great transition. This transition is economic, as the digital revolution advances and as new powers and groups emerge.

Not many countries establish a prize for peace. The Seoul Peace Prize has its roots in the 1988 Summer Olympics when this country opened its doors to people and athletes from more than 160 countries. Korea did so in part because it believes in the power of sports for peace and development.