Idiocracy

[Alex]

The same argument is made (and generally rejected) that the Western nations need to boost their birth rates so that it isn't left to those ignorant Muslims to populate the world. It is an old fear that has surfaced many times through history as demographics and ethnic geography shift.

The response is generally down one of three channels:

1) Promote genetic isolationism to avoid dilution of community and power (Jews marrying Jews as an internal isolationism; anti-miscegination laws as an external isolationism)

2) Ethnic cleansing. Physically prevent the growth of the "undesirable" population through murder, relocation, or forced sterilization.

3) Absorption. Force/convince the others to give up what makes them "other" and accept your view. This could be brutal as forced religious conversion or general educational/health/economic improvements that are strongly correlated with attitude and behavioral changes.

Maybe the "wrong" people will eventually take over the world but I'll be dead so I won't really care.