Lynn and Vanhanen test the hypothesis on the causal relationship between the average national intelligence (IQ) and the gap between rich and poor countries by empirical evidence. Based on an extensive survey of national IQ tests, the results of their work challenge the previous theories of economic development and provide a new basis to evaluate the prospects of economic development throughout the world. They begin by reviewing and evaluating some major previous theories. The concept of intelligence is then described and intelligence quotient (IQ) introduced. Next they show that intelligence is a significant determinant of earnings within nations, and they connect intelligence with various economic and social phenomena. The sociology of intelligence at the level of sub-populations in nations is examined, and the independent (national IQ) and dependent (various measures of per capita income and economic growth rates) variables are defined and described. They then provide empirical analyses starting from the 81 countries for which direct evidence of national IQs is available; the analysis is then extended to the world group of 185 countries. The hypothesis is tested by the methods of correlation and regression analyses. The results of statistical analyses support the hypothesis strongly. The results of the analyses and various means to reduce the gap between rich and poor countries are discussed. A provocative analysis that all scholars, students, and researchers involved with economic development need to confront.

Argues that a significant part of the gap between rich and poor countries is due to differences in national intelligence.

Over the last few decades, economists and psychologists have quietly documented the many ways in which a person's IQ matters. But, research suggests that a nation's IQ matters so much more. As Garett Jones argues in Hive Mind, modest differences in national IQ can explain most cross-country inequalities. Whereas IQ scores do a moderately good job of predicting individual wages, information processing power, and brain size, a country's average score is a much stronger bellwether of its overall prosperity. Drawing on an expansive array of research from psychology, economics, management, and political science, Jones argues that intelligence and cognitive skill are significantly more important on a national level than on an individual one because they have "positive spillovers." On average, people who do better on standardized tests are more patient, more cooperative, and have better memories. As a result, these qualities—and others necessary to take on the complexity of a modern economy—become more prevalent in a society as national test scores rise. What's more, when we are surrounded by slightly more patient, informed, and cooperative neighbors we take on these qualities a bit more ourselves. In other words, the worker bees in every nation create a "hive mind" with a power all its own. Once the hive is established, each individual has only a tiny impact on his or her own life. Jones makes the case that, through better nutrition and schooling, we can raise IQ, thereby fostering higher savings rates, more productive teams, and more effective bureaucracies. After demonstrating how test scores that matter little for individuals can mean a world of difference for nations, the book leaves readers with policy-oriented conclusions and hopeful speculation: Whether we lift up the bottom through changing the nature of work, institutional improvements, or freer immigration, it is possible that this period of massive global inequality will be a short season by the standards of human history if we raise our global IQ.

Nations can vary greatly in their wealth, democratic rights and the wellbeing of their citizens. These gaps are often obvious, and by studying the flow of immigration one can easily predict people's wants and needs. But why are there also large differences in the level of education indicating disparities in cognitive ability? How are they related to a country's economic, political and cultural development? Researchers in the paradigms of economics, psychology, sociology, evolution and cultural studies have tried to find answers for these hotly debated issues. In this book, Heiner Rindermann establishes a new model: the emergence of a burgher-civic world, supported by long-term background factors, furthered education and thinking. The burgher-civic world initiated a reciprocal development changing society and culture, resulting in past and present cognitive capital and wealth differences. This is an important text for graduate students and researchers in a wide range of fields, including economics, psychology, sociology and political science, and those working on economic growth, human capital formation and cognitive development.

Through more than 50 years of academic research, Richard Lynn has distinguished himself as one of the world's preeminent authorities on intelligence, personality, and human biodiversity. *Race Differences in Intelligence* is his essential work on this most controversial and consequential topic. Covering more than 500 published studies that span 10 population groups, Lynn demonstrates both the validity of innate intelligence as well as its heritability across racial groups. The Second Edition (2014) has been revised and updated to reflect the latest research.