Now, there are some who question the scale of our ambitions — who suggest that our system cannot tolerate too many big plans. Their memories are shor… - Barack Obama

We will defend our people and uphold our values through strength of arms and rule of law. We will show the courage to try and resolve our differences with other nations peacefully –- not because we are naïve about the dangers we face, but because engagement can more durably lift suspicion and fear. America will remain the anchor of strong alliances in every corner of the globe. And we will renew those institutions that extend our capacity to manage crisis abroad, for no one has a greater stake in a peaceful world than its most powerful nation. We will support democracy from Asia to Africa, from the Americas to the Middle East, because our interests and our conscience compel us to act on behalf of those who long for freedom. And we must be a source of hope to the poor, the sick, the marginalized, the victims of prejudice –- not out of mere charity, but because peace in our time requires the constant advance of those principles that our common creed describes: tolerance and opportunity, human dignity and justice.

And yet, in our rush to respond to a very real and novel set of threats, the risk of government overreach -- the possibility that we lose some of our core liberties in pursuit of security -- also became more pronounced. […] intelligence agencies cannot function without secrecy, which makes their work less subject to public debate. Yet there is an inevitable bias not only within the intelligence community, but among all of us who are responsible for national security, to collect more information about the world, not less. So in the absence of institutional requirements for regular debate -- and oversight that is public, as well as private or classified -- the danger of government overreach becomes more acute. And this is particularly true when surveillance technology and our reliance on digital information is evolving much faster than our laws.

More than anyone, this book is for those young people — an invitation to once again remake the world, and to bring about, through hard work, determination, and a big dose of imagination, an America that finally aligns with all that is best in us.