I don't say that the West is united, I don't suggest that.

America doesn't border on Muslim countries. European countries do and that seems to be a fundamental difference.

The United States has been an immigrant country. The Hispanics who come here are largely from Mexico and South America. They are Catholics, but that is an American religion. One-third of our population is Catholic so that does not have the same impact as Muslims coming into Europe.

Certainly here in the U.S., we've had fundamentalist movements that have taken very critical and hostile attitudes toward immigration and the assimilation of immigrants into our society and culture. So these tendencies are fairly universal. The problem is what if they get out of hand and become the dominant factor in a society, which can only lead to the oppression of minorities or even to war with neighboring societies with differing cultures. That's why it seems to me it's important to try to keep these tendencies toward extremism under control.

As far as ideology or political beliefs are concerned, countries are very different.

In the 19th century it was basically nationality and people trying to define their nationalism and create states which would reflect their nationalism. In the 20th century, ideology came to the fore, largely, but not exclusively, as a result of the Russian Revolution and we have fascism, communism and liberal democracy competing with each other. Well that's pretty much over.

Maybe Iraq will come back and become the dominant power among Arab countries. That seems to me as conceivable.