Few areas of psychology attract as much discussion and debate as the topic of intelligence, more particularly, the use of intelligence tests in selection at work. More academic researchers have been attacked, hounded, sacked, and vilified for what they have written about intelligence than about any other topic. There is also still considerable debate about the role of intelligence testing in the educational settings. However, the science and the practice of intelligence testing remain far apart because of the history of misunderstanding, misapplications, and political differences. It remains difficult, even with supposedly disinterested scientists, to have an evidence-based debate about the origin of individual differences in intelligence, the measurement of intelligence, and the application of tests in commercial and educational settings.