Please, take a look at the information provided just by the site, http://www.demographicwinter.com/index.html# let alone thinking of acquiring the associated DVD.
In association with this oncoming cultural, economic, societal ice age among, essentially, those of Indo-European origins, I also have to agree with the commentators who warn that increases in Muslim immigrant populations are worse than a bad answer to demographic problems. Our own illegal (Latino-based) immigration problems also are a poor answer, since like the bulk of Muslims, these local immigrants do not bring 1. desire to assimilate and 2. economically progressive education and training and attitudinal traits to "our growing needs to grow", which after all is more than just spiritually.
Or, do you consider shari'a - Muslim theocracy and thug-ocracy - some kind of desirable progress?


