That's an interesting premise...how are these groups with higher TFR identified? Is there a book from which this theory originates?
This is based on research by Kaufmann. Any muslim group that sees the sharia as an important guideline, would make this group of sustainable TFR. That is the given part. Not every subgroup, however, has the potential to be included in elite formation. That would be the second part.
The book is:
Shall the Religious Inherit the Earth? Demography and Politics in the Twenty-First Century.
The book is:
Shall the Religious Inherit the Earth? Demography and Politics in the Twenty-First Century.
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