rich1.0adelradwan wroteadelradwan (npub1m2…dk6u8)https://yabu.me/npub1m2wun0kt7ej7adj8qweedj4mk97ffcuah07pycg0dhw3hhjqg4dsmdk6u8njumphttps://yabu.meThat's an interesting premise...how are these groups with higher TFR identified? Is there a book from which this theory originates?