Mark Steyn, in the introduction to America Alone:

1970 doesn't seem that long ago. If you're in you fifties or sixties, as many of the chaps running the Western world are wont to be, your pants are narrower than they were back then and your hair's less groovy, but the landscape of your life--the look of your house, the layout of your car, the shape of your kitchen appliances, the brand names of the stuff in the fridge--isn't significantly different. And yet that world is utterly altered. Just to recap those bald statistics: in 1970, the developed nations had twice as big a share of the global population as the Muslim world: 30 percent to 15 percent. By 2000, they were at parity: each had about 20 percent.

And by 2020?

September 11, 2001, was not "the day everything changed," but the day that revealed how much had already changed. On September 10, how many journalists had the Council on American-Islamic Relations or the Canadian Islamic Congress or the Muslim Council of Britian in their Rolodexes? If you'd said that whether something does or does not cause offense to Muslims would be the early twenty-first century's principal political dynamic in Denmark, Sweden, the Netherlands, Belgium, France, and the United Kingdom, most folks would have thought you were crazy. Yet on that Tuesday morning the top of the iceberg bobbed up and toppled the Twin Towers.

This book is about the seven-eighths below the surface--the larger forces at play in the developed world that have left Europe too enfeebled to resist its remorseless transformation into Eurabia and that call into question the future of much of the rest of the world, including the United States, Canada, and beyond. The key factors are:

1. Demographic decline
2. The unsustainability of the advanced Western social-democratic state
3. Civilizational exhaustion

Let's start with demography, because everything does. I'm already enthralled.