Joseph Nye

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.

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.

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