I am both surprised and deeply humbled by the decision of the Nobel Committee. Let me be clear: I do not view it as a recognition of my own accomplishments, but rather as an affirmation of American leadership on behalf of aspirations held by people in all nations.

To be honest, I do not feel that I deserve to be in the company of so many of the transformative figures who have been honoured by this prize – men and women who have inspired me and inspired the entire world through their courageous pursuit of peace.

But I also know that this prize reflects the kind of world that those men and women, and all Americans, want to build – a world that gives life to the promise of our founding documents. And I know that, throughout history, the Nobel Peace Prize has not just been used to honour specific achievement; it's also been used as a means to give momentum to a set of causes. And that is why I will accept this award as a call to action – a call for all nations to confront the common challenges of the 21st-century.

These challenges can't be met by any one leader or any one nation. And that's why my administration has worked to establish a new era of engagement in which all nations must take responsibility for the world we seek...

Some of the work confronting us will not be completed during my presidency. Some, like the elimination of nuclear weapons, may not be completed in my lifetime. But I know these challenges can be met so long as it's recognised that they will not be met by one person or one nation alone. This award is not simply about the efforts of my administration – it's about the courageous efforts of people around the world.

And that's why this award must be shared with everyone who strives for justice and dignity – for the young woman who marches silently in the streets on behalf of her right to be heard even in the face of beatings and bullets; for the leader imprisoned in her own home because she refuses to abandon her commitment to democracy; for the soldier who sacrificed through tour after tour of duty on behalf of someone half a world away; and for all those men and women across the world who sacrifice their safety and their freedom and sometimes their lives for the cause of peace.

That has always been the cause of America. That's why the world has always looked to America. And that's why I believe America will continue to lead. Thank you very much.