Family traditions are more than arguments with the dead, more than collections of family letters you try to decipher. A tradition is also a channel of memory through which fierce and unrequited longings surge, longings that define and shape a whole life.

Patriotism is the secret resource of a successful society.

Cynics who say power is all that counts in politics forget that power without ideas is just improvisation.

Those with a gift for action, for their part, often express contempt for those whose gifts are more reflective. Men of action like to say, Those who can, do, those who cant, teach, forgetting that those who teach get to write the history books.

Tad Homer-Dixon is a rare kind of public intellectual, who combines real expertise with a commitment to communicate to the widest possible readership. In The Ingenuity Gap he wants us all to wake-up to the fearful possibility that our blithe trust in science and technology may be misplaced. Human ingenuity may not be capable of coping with two emerging crises of this century and the next: population growth and environmental despoliation. Read Homer Dixon's wake-up call and you will see the future very differently.

I'm very struck by what you can do in a classroom. I've got 200 students. You don't do partisan politics in a classroom, that's not appropriate. But you want to give them a strong sense that these are the issues that matter.

Genocide is not just a murderous madness; it is, more deeply, a politics that promises a utopia beyond politics - one people, one land, one truth, the end of difference. Since genocide is a form of political utopia, it remains an enduring temptation in any multiethnic and multicultural society in crisis.