In academic life, false ideas are merely false and useless ones can be fun to play with. In political life, false ideas can ruin the lives of millions and useless ones can waste precious resources. An intellectual's responsibility for his ideas is to follow their consequences wherever they may lead. A politician's responsibility is to master those consequences and prevent them from doing harm. Michael Ignatieff, a former professor at Harvard and contributing writer for the magazine, is a member of Canada's Parliament and deputy leader of the Liberal Party.

Public service does not necessarily mean service in the House of Commons, and public service is not synonymous with partisan political activity. It comes in a thousand colours, but the common denominator is: it's not about me - it's about we.

Patriotism is the secret resource of a successful society.

There's a civic nationalism in Britain and dozens of other countries.

The party's got to see itself as being one public service organization in a very competitive field, all of whom are competing for the allegiance and commitment and brains of the next generation. They've got to be big enough to reach out to those groups and say "come on in."

An intellectual may be interested in ideas and policies for their own sake, but a politician's interest is exclusively in the question of whether an idea's time has come.

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.