Nationalism is a central ideology for people who are trying to establish their own states in which they can play a dominant role.

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.

Some Westerners […] have argued that the West does not have problems with Islam but only with violent Islamist extremists. Fourteen hundred years of history demonstrate otherwise.

It will take a long time, and certainly the West will remain the dominant civilization well into the next century, but the decline is occurring.

Hispanics speak Spanish or Portuguese, which are languages we Americans are familiar with, so it doesn't seem to pose the same types of problems as Arabic-speaking Muslims do in Europe.

In the coming decades, questions of identity, meaning cultural heritage, language, and religion will play a central role in politics.

When you have increased migration of peoples and ethnic and religious minorities, you develop a set of rules and language the larger society can accept and the minority community can accept.