Over the past few decades, economists and psychologists have discreetly documented the many aspects affected by human IQ. However, research suggests that a country's IQ matters much more. As Garett Jones argues in his book "Hive Mind," small differences in national IQ can explain most of the inequality between countries. While IQ scores predict individual earnings, information processing power and brain size quite well, a country's average score is a much stronger indicator of its overall well-being. Drawing on a wide range of research in psychology, economics, management and political science, Jones argues that intelligence and cognitive ability are much more important at the national level than at the individual level because they have "positive spillover effects." On average, people who perform better on standardized tests are more patient, more cooperative and have better memory. As a result, these qualities - and others necessary for coping with the complexities of a modern economy - are becoming more common in society as national test scores rise. What's more, by surrounding ourselves with slightly more patient, aware and cooperative neighbors, we ourselves also acquire these traits to a greater degree. In other words, worker bees in each country form a "collective mind" with their own unique power. Once the hive is formed, each individual has only a small amount of influence.