American power in the world relies on these ideals of openness and critical debate.

Leadership experts and the public alike extol the virtues of transformational leaders - those who set out bold objectives and take risks to change the world. We tend to downplay 'transactional' leaders, whose goals are more modest, as mere managers.

In the information age, it's not just whose army wins, but whose story wins.

Terrorism is like jujitsu: The small players win if they make the large player use his strength against himself.

As we think of power in the 21st century, we want to get away from the idea that power’s always zero sum — my gain is your loss and vice versa. Power can also be positive sum, where your gain can be my gain.

Money and donations are an important part of our political system. They are hard power.

His [Osama bin Laden]excessive use of terror, including numerous attacks that indiscriminately killed many women and children, and of course many Muslims, has hurt the attractiveness of his message.