IQ and Global Inequality - Summary

Summary

Human intelligence
Abilities, traits and constructs
  • Abstract thought
  • Communication
  • Creativity
  • Emotional intelligence
  • g factor
  • Intelligence quotient
  • Knowledge
  • Learning
  • Memory
  • Problem solving
  • Reaction time
  • Reasoning
  • Understanding
  • Visual processing
Models and theories
  • Cattell–Horn–Carroll theory
  • Fluid and crystallized intelligence
  • Theory of multiple intelligences
  • Three stratum theory
  • Triarchic theory of intelligence
  • PASS theory of intelligence
Fields of study
  • Cognitive epidemiology
  • Evolution of human intelligence
  • Psychometrics
  • Heritability of IQ
  • Impact of health on intelligence
  • Environment and intelligence
  • Neuroscience and intelligence
  • Race and intelligence
  • Chapter 1 summarizes theories of economic growth.
  • Chapter 2 defines and describes intelligence.
  • Chapter 3 argues that the scientific literature indicates that intelligence is a determinant of incomes and related phenomena among individuals within a number of countries.
  • Chapter 4 describes the collection and determination of national IQ, presenting calculated IQs for 113 countries and estimated IQs for an additional 79 countries. This represents all countries with population greater than 40,000.
  • Chapter 5 introduces a new statistic, the quality of human condition index (QHC) and 12 alternative variables that measure human conditions.
  • Chapter 7 focuses on the relationship between national IQ and QHC, which Lynn and Vanhanen report to be strongly correlated.
  • Chapter 8 examines the relationship between national IQ and 12 alternative variables, which Lynn and Vanhanen report are also correlated with national IQ.
  • Chapter 9 discusses the genetic and environmental contributions to differences in national intelligence, and argues that racial composition of the population is a major factor.
  • Chapter 10 considers the causal relationship between national IQ and important variables related to global inequality.
  • Chapter 11 discusses and responds to criticisms made to Lynn and Vanhanen's theory by reviewers.
  • Chapter 12 summarizes the book and discusses policy recommendations.

Significant correlations with higher national IQ were found for a number of factors: higher GDP/capita, higher adult literacy rate, higher gross tertiary education enrollment ratio, higher life expectancy at birth, higher level of democratization 2002 (Tatu Vanhanen's Index of Democratization), higher Human Development Index, higher Gender-related Development Index, higher economic growth rate, lower Gini index of inequality in income or consumption, lower population below the $2 a day international poverty line, lower measures of undernourishment, lower maternal mortality ratio, lower infant mortality rate, higher Corruption Perceptions Index, higher Economic Freedom of the World ratings, higher Index of Economic Freedom ratings, and more narrow population pyramid (MU Index).

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