```Steyn attributes the forecast fall of the Western world to three factors:
Demographic decline, based on the observation that European nations have low birth rates while Muslim nations have higher birth rates. Specifically, in recent years the population of the developed world declined from about 30% of world population to around 20%, while the population of Muslim nations increased from about 15% to 20%.
The unsustainability of the advanced Western social-democratic state, based on the thesis that the responsibilities of normal adults, such as care of the elderly, childcare, health care and insurance, have been slowly taken over by the state. Steyn argues that these programs erode humanity's basic sense of self-reliance to a point at which a more resilient group of people — Muslims in his view — will take control.
The exhaustion of civilization. Steyn argues that Western nations are so focused on moral and cultural relativism—with "diversity" and "racism" as their new favorite words—that they are unable to see that their existence is threatened. Specifically, he argues that European nations have given up defending themselves and rely on America for their defense. He views anti-Americanism as a symptom of civilizational exhaustion, whether manifested by Muslims (to whom America symbolizes gay porn, children born out of wedlock, immodest women, and immorality) or by Europeans (to whom America symbolises a crude and radical Christianity, fat rednecks and uncontrolled firearms). However in his view America is the most benign hegemonic power the world has ever seen. According to Steyn, America will be the last and only country—as all others will be taken over by Muslims—that will retain its sense of self-preservation, but this is not a given, as America's enemies know that it ran from Vietnam and they hope that America will continue to flee when faced with a challenge.```
