Should we even have the classification system? Why shouldn't these things be open? There are things you want to keep secret, like the characteristics of your latest fighter plane or something like that.

In fact, it's doing it all over the world. Obama, first of all, is running the biggest terrorist operation that exists, maybe in history. The drone assassination campaigns, which are just part of it. All of these operations, they are terror operations.

The whole infrastructure of air travel was, and is, part of government policy. It is not a natural development of a free economic system - at least not in the way that is claimed. The same is true of the roads, of course.

It has been known for some time that a major nuclear war might lead to nuclear winter that would destroy the attacker as well as the target. And threats are now mounting, particularly at the Russian border, confirming the prediction of George Kennan and other prominent figures that NATO expansion, particularly the way it was undertaken, would prove to be a "tragic mistake," a "policy error of historic proportions."

Individuals in a university - students, faculty, staff - can choose to become politically engaged, and a free university should foster a climate in which those are natural choices.

As for geoengineering, there have been serious general critiques that I think cannot be ignored, like Clive Hamilton's, along with many positive assessments. It is not a matter for subjective judgment based on guesswork and intuition. Rather, these are matters that have to be considered seriously, relying on the best scientific understanding available, without abandoning sensible precautionary principles.

If you assume that there is no hope, you guarantee that there will be no hope. If you assume that there is an instinct for freedom, that there are opportunities to change things, then there is a possibility that you can contribute to making a better world.