To build a mass movement, nonviolence is indispensable.

You see often it's not ideas, it's inertia, it's bureaucratism, it's all the other things that sometimes come in the way of a good idea.

When you are threatened, when your life is threatened, you have to fight back.

The Islamic State is able to raise finances through taxation, through theft of banks, and certainly through oil sales from the Omar oilfields in eastern Syria. So right now the question of funding isn't of the essence.

Interestingly, if you write preparation out of history, leadership and preparation, the building of confidence among people who are exploited, you've actually methodologically written out the Communists because, when an uprising takes place, you don't necessarily see red flags everywhere.

Over the last two or so decades, there's been an increase in thinking among the Left, liberals, intellectuals in the direction of so-called spontaneity. In other words that uprisings happen spontaneously, people are frustrated, angry, then they spontaneously rise up. And what they don't require is preparation, or what we used to call leadership.

There are people who are saying that they voted twice for Mr. Obama and they are now feeling a great sense of regret, not only over Guantanamo, etc., but now perhaps the entry into a new war in West Asia.