Men have to take more responsibility. Men have to intervene

I don't think I underestimated [Vladimir Putin], but I think that I underestimated the degree to which, in this new information age, it is possible for misinformation for cyber hacking and so forth to have an impact on our open societies, our open systems, to insinuate themselves into our democratic practices in ways that I think are accelerating.

Poorly secured nuclear material in the former Soviet Union, or secrets from a scientist in Pakistan could help build a bomb that detonates in Paris. The poppies in Afghanistan become the heroin in Berlin. The poverty and violence in Somalia breeds the terror of tomorrow.

Peace depends upon compromise among peoples who must live together long after our speeches are over, long after our votes have been tallied.

There's no doubt that I'm a better president now than when I first took office. This is not a job where there's a manual, and over time you get a better sense of what's important, what's not, how to see around corners and anticipate problems, as opposed to just managing problems once they've arrived.

We are going through historic times, and my vision is a world, first of all, in which America continues to be that one indispensable nation. Because we're taking care of our own people, because our economy is strong and our middle class is growing, and people feel like hard work is rewarded, and we are continuing to expand opportunity and diversity and tolerance and respect.

Historically, when a previous US administration enters into an agreement, it carries forward into the future administration.