The controversial book linking intelligence to class and race in modern society, and what public policy can do to mitigate socioeconomic differences in IQ, birth rate, crime, fertility, welfare, and poverty.

Herrnstein & Murray's The Bell Curve is a deeply controversial text that raises serious issues about the stakes involved in reasoning and interpretation. The authors’ central contention is that intelligence is the primary factor determining social outcomes for individuals – and that it is a better predictor of achievement than income, background or socioeconomic status. One of the major issues raised by the book was its discussion of 'racial differences in intelligence,' and its contention that there is a link between the low observed test scores and social outcomes for African-Americans and their lack of social attainment. While the authors produce and interpret a great deal of data to back up their contentions, they ultimately fail to tackle the problem that neither 'intelligence' nor 'race' have widely accepted definitions in biology, anthropology or sociology. In consequence, the book it has been termed both ‘racist’ and ‘pseudoscientific’ thanks to what its critics see as both its faulty reasoning and its uncautious interpretation of evidence. The debate continues to this day, with academics on both sides engaged in fierce arguments over what can be argued from the data that Herrnstein and Murray used.

The two aspects of cognitive abilities (IQ and wisdom) are leveraged by Dr. Harry Chang et al. in The Bell Curve Plus: Intelligence and the War of Civilizations in analyzing the current situation in the United States. After reviewing different cultures, religions, and Jewish history, the authors deduce that the fight between Democrats and Republicans is caused by the different civilizations, which were created by the cognitive abilities of the people. Jewish civilization has collectivism feature and is the opposite of Western civilization, which is based on individualism. Collectivism leads to American Marxism. Through research and analysis of the current affairs, the authors conclude that democracy only works well with a Western civilization. There are some prerequisites for it to work with other civilizations. Further, freedom of religion is politically flawed.

In this book author Michael Mingroni describes a scientific hypothesis that suggests human populations are undergoing rapid genetic change as a result of demographic changes such as urbanization and population mobility. As recently as two centuries ago, it was much more common for people in the now industrialized parts of the world to live in small towns and villages. Owing to their relative isolation, each village of the past would have constituted its own distinct gene pool. The movement of people to the cities has led to a mixing of those gene pools. Plant and animal breeders have long known that the crossing of genetically distinct strains of a species can cause large, rapid changes in various traits. The offspring of crosses, known as hybrids, generally grow larger and faster than either of the parental strains from which the hybrids are produced. The same effect is likely occurring in our own species. The technical term for this genetic effect, commonly known as hybrid vigor, is heterosis. Several studies have already documented the expected genetic changes in the form of increased genetic heterozygosity. These genetic changes offer a possible cause of trends in traits such as height, growth rate, IQ and others. They could also explain trends in conditions such as autism, asthma, myopia and others. Because it involves the mixing of all genes in the genome, heterosis can explain the occurrence of multiple parallel trends. Because it relies on the mixing of existing genetic material, heterosis can explain the very rapid pace of the trends. Most importantly, because it is a genetic mechanism, heterosis can explain why the various traits and conditions have always appeared to be strongly influenced by genetic, not environmental, factors. That is, it can explain their high heritability. In the book, the hypothesis is explained, ways by which it can be tested are listed, and some of its potential implications are explored.

This open access book examines the implications of The Bell Curve for the social, economic, and political developments of the early 21st century. Following a review of the reception of The Bell Curve and its place in the campaign to end affirmative action, Professor Tucker analyses Herrnstein’s concept of the “meritocracy” in relation to earlier 20th century eugenics and the dramatic increase in economic inequality over the past 30 years. Tucker demonstrates how, contrary to The Bell Curve’s predictions, the reallocation of these huge sums was neither rational nor beneficial for society. The book moves on to situate The Bell Curve within contemporary politics and shows how it can be seen to have played a role in the 2016 US election. This compelling analysis will appeal to scholars and those with an interest in the history of scientific racism, the history of psychology and the sociology of knowledge and science. This is an open access book.

In this book, Janes H. MacCabe discusses evidence from Swedish population data suggesting that children who achieve either exceptionally high, or very low grades at school, are at greater risk of adult mental health.

Finally, an answer to "The Bell Curve"

Learn how to use data science and Python to solve everyday business problems. Dive into the exciting world of data science with this practical introduction. Packed with essential skills and useful examples, Dive Into Data Science will show you how to obtain, analyze, and visualize data so you can leverage its power to solve common business challenges. With only a basic understanding of Python and high school math, you’ll be able to effortlessly work through the book and start implementing data science in your day-to-day work. From improving a bike sharing company to extracting data from websites and creating recommendation systems, you’ll discover how to find and use data-driven solutions to make business decisions. Topics covered include conducting exploratory data analysis, running A/B tests, performing binary classification using logistic regression models, and using machine learning algorithms. You’ll also learn how to: Forecast consumer demand Optimize marketing campaigns Reduce customer attrition Predict website traffic Build recommendation systems With this practical guide at your fingertips, harness the power of programming, mathematical theory, and good old common sense to find data-driven solutions that make a difference. Don’t wait; dive right in!

An unflinching look at the origins, philosophy, meanings, and impact of the radical form of conservatism that currently dominates American politics. Analyzing the literature (books, magazines, newspapers) and broadcast sources that define and promote conservatism, Toplin leads the reader on a provocative tour of the conservative mind as viewed by a liberal tour guide.

Coincidences in daily events can give us messages that we can use to direct our path in life. So asserts author Craig Bell, who uses the systems of symbols underlying both coincidences and dreams to develop a system for personal growth.