This is the best book I have read on these subjects. Caldwell is sharp-minded, serious, critical, and clear. He writes very well indeed, both in terms of his style and the ordering and presentation of his many ideas. Little escapes him. Most impressive is the way he tackles a difficult, sometimes taboo, subject like immigration and writes about it often in the context of Muslim issues in Europe, and does all this from a genuinely liberal perspective, defying both the far right, who see immigration and Islam in racist terms, and the far left, for whom multiculturalism and political correctness have become dogmas it is forbidden to challenge. You won't find a more intelligent approach to these important subjects (though equally intelligent studies are available from Jon Gower Davies -- Bonfires on the Ice and In Search of the Moderate Muslim).