CHAPTER 1: THE EVOLUTION OF HUMAN DIVERSITY
Traces human migrations out of Africa and resulting adaptations.
Highlights environmental pressures shaping genetic variations.
CHAPTER 2: GENETICS 101: WHAT WE KNOW ABOUT INHERITANCE
Explains Mendelian and polygenic inheritance mechanisms.
Discusses heritability estimates and population-level differences.
CHAPTER 3: PHYSICAL DIFFERENCES: MORE THAN SKIN DEEP
Examines variations in bone density and muscle fiber types by ancestry.
Links physical traits to evolutionary adaptations in sports and health.
CHAPTER 4: DISEASE SUSCEPTIBILITY & GENETIC ADAPTATIONS
Details genetic resistances like sickle cell trait against malaria.
Explores trade-offs in immunity and chronic diseases across groups.
CHAPTER 5: THE BRAIN: EVOLUTION'S MOST COMPLEX ADAPTATION
Reviews fossil evidence of brain size and shape divergences.
Connects genetic footprints to neural structures by population.
CHAPTER 6: IQ TESTING: A CENTURY OF DATA
Chronicles the history from Binet to modern Wechsler scales.
Presents persistent group score patterns across global tests.
CHAPTER 7: THE HERITABILITY OF INTELLIGENCE
Analyzes twin and adoption studies showing high genetic influence.
Explains how heritability increases with age and SES.
CHAPTER 8: ENVIRONMENTAL EXPLANATIONS: WHY THEY FALL SHORT
Critiques poverty and education as sole causes of gaps.
Shows gaps persisting after controlling for SES and health.
CHAPTER 9: THE GENETIC BASIS OF COGNITIVE DIFFERENCES
Outlines GWAS findings on polygenic scores for intelligence.
Discusses key genes varying by ancestry and their functions.
CHAPTER 10: SUPPRESSED STUDIES: THE POLITICS OF SCIENCE
Details cases of researchers facing backlash and censorship.
Exposes institutional mechanisms stifling inquiry.
CHAPTER 11: EDUCATION REFORM: A TRILLION-DOLLAR FAILURE?
Traces U.S. reform history from Head Start to Common Core.
Calculates massive costs with minimal gap closures.
CHAPTER 12: THE COST OF DENIAL: SOCIAL & ECONOMIC IMPACTS
Quantifies GDP losses from unaddressed cognitive disparities.
Explores social rifts like resentment and crime cycles.
CHAPTER 13: COUNTERARGUMENTS: DEBUNKING THE DEBUNKERS
Refutes claims that race lacks biological basis.
Defends IQ tests against bias accusations with data.
CHAPTER 14: GLOBAL PERSPECTIVES: IQ & NATIONAL PROSPERITY
Maps national IQ estimates and economic correlations.
Examines regional examples like East Asian growth.
CHAPTER 15: THE ETHICS OF TRUTH: SHOULD WE EVEN TALK ABOUT THIS?
Weighs philosophical duties of truth-seeking against harms.
Discusses historical misuses and modern censorship risks.
CHAPTER 16: FUTURE RESEARCH: WHAT WE COULD LEARN IF WE DARED
Speculates on advanced GWAS and multi-ancestry mapping.
Envisions neuroscience breakthroughs like organoid comparisons.
CHAPTER 17: PERSONAL STORIES: VOICES FROM THE FRINGE
Shares anonymized accounts of academics facing backlash.
Details educators applying data in real-world settings.
CHAPTER 18: ALTERNATIVES TO THE STATUS QUO
Proposes gene-tailored education and hiring systems.
Advocates biology-informed welfare and migration policies.
CHAPTER 19: THE BIGGER PICTURE: HUMANITY'S GENETIC LEGACY
Reflects on shared origins and divergent evolutionary paths.
Reframes equality as equitable diversity honoring legacies.
CHAPTER 20: CONCLUSION: BREAKING THE CHAINS OF DENIAL
Calls for demanding transparent and honest science.
Envisions policies honoring biology without hierarchy.
