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Index
Front Matter
Publisher Information
Quotation
Acknowledgements
At Our Wits’ End
One
Don’t be Stupid!
The Decline of Intelligence
The Grand Plan
Back to the Concorde and the Moon
Two
Different Kinds of Intelligence
Intelligence and IQ Tests
The Causes of Intelligence Differences
‘But What Do You Mean By Intelligence?’
‘Intelligence Means Different Things in Different Cultures’
‘We Don’t Know the Genes Behind Intelligence, so We’re Just Speculating’
‘There Are Different Kinds of Intelligence’
‘Intelligence is a Very Western Concept’
‘Intelligence and Ranking People by Their IQ Makes Me Feel Morally Uncomfortable. It’s Very Dangerous’
Three
Sexual Selection
Social Selection
Group Selection
Selection for Intelligence in Animals
Hunter-Gatherers
Pastoralists
Early Nation States
The Christian World
Fertility in the Early Modern Era
Executing the Less Intelligent
Upward Social Mobility in the Early Modern Era
Illegitimates
Four
Interest Rates
Literacy and Numeracy
Judicial Violence and Blood Sports
The Size of the Head
Democracy and Political Stability
Corruption
Murder
Genetic Changes: Comparing the Bronze Age to the Present
Five
The Big Five
The General Factor of Personality
How Personality Develops and Why there are Differences
Six
The Nature of Genius: Meeting Sir Isaac Newton
The Evolution of Genius
The Growth of Genius
Seven
Scientists Who Predicted Intelligence Would Decline
What is the Association between Intelligence and Fertility Now?
Why Do Smarter People Have Fewer Children?
Eight
What Is Going On?
Scientific Spectacles
The Reversal of the Flynn Effect
The Impact of the Flynn Effect
Nine
Simple Reaction Times
Colour Discrimination
Use of High-Difficulty Words
Backward Digit Span
Spatial Perception
Piagetian Developmental Staging
Genius Levels and Macro-innovations
Creativity
Putting it All Together: The g.h Chronometric Factor
The Smoking Gun: A Decline in the Frequencies of Variants in the Genome Associated with Educational Attainment and g
What about Pollution?
Why Did the Murder Rate Continue to Decline?
Should We Be Telling You This?
Ten
The Fall
Progress
Cycles
Modern Social Cycle Theories
Cutting Through it All with General Intelligence
Virtue Signalling and Equality
Climate Change
Eleven
Rome and General Intelligence
Contraception and Christianity
Islamic Civilisation
Chinese Civilisation
‘What Has Been Will Be Again’
Twelve
The Seeds of Western Civilisation
The Spring of Civilisation
The Summer of Civilisation
Autumn
Winter
Thirteen
Eugenics
Nurturing Genius
Religion
Long-Term Knowledge Storage
The Bleak Mid-Winter
Back Matter
About the Authors
Also Available
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