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The '''dysgenic fertility''' theory posits an inverse relationship between intelligence and fertility (Lower intelligence people having more children).
The '''dysgenic fertility''' theory posits an inverse relationship between intelligence and fertility (Lower intelligence people having more children).
As far as [[dysgenic]] fertility (people with lower intelligence having more children) and its effect on population's intelligence, the abstract for journal article ''IQ and fertility: A cross-national study'' published in the journal ''Intelligence'' states: "Many studies have found a small to moderate negative correlation between [[IQ]] and fertility rates. However, these studies have been limited to the United States and some European countries. The present study was a between-nation study using national IQ scores and national fertility rates. There were strong negative correlations found between national IQ and three national indicators of fertility."<ref>Abstract for journal article ''Intelligence'', [https://www.sciencedirect.com/science/article/abs/pii/S0160289607000244#:~:text=Numerous%20studies%20have%20confirmed%20that,with%20higher%20levels%20of%20IQ. IQ and fertility: A cross-national study] by Steven M. Shatz, Volume 36, Issue 2, March–April 2008, Pages 109-111</ref>
As far as [[Dysgenics|dysgenic]] fertility (people with lower intelligence having more children) and its effect on population's intelligence, the abstract for journal article ''IQ and fertility: A cross-national study'' published in the journal ''Intelligence'' states: "Many studies have found a small to moderate negative correlation between [[IQ]] and fertility rates. However, these studies have been limited to the United States and some European countries. The present study was a between-nation study using national IQ scores and national fertility rates. There were strong negative correlations found between national IQ and three national indicators of fertility."<ref>Abstract for journal article ''Intelligence'', [https://www.sciencedirect.com/science/article/abs/pii/S0160289607000244#:~:text=Numerous%20studies%20have%20confirmed%20that,with%20higher%20levels%20of%20IQ. IQ and fertility: A cross-national study] by Steven M. Shatz, Volume 36, Issue 2, March–April 2008, Pages 109-111</ref>
The abstract for the journal article ''Do high-status people really have fewer children? : Education, income, and fertility in the contemporary U.S'' published in the journal ''Human Nature'' states:
The abstract for the journal article ''Do high-status people really have fewer children? : Education, income, and fertility in the contemporary U.S'' published in the journal ''Human Nature'' states: