'Flynn has made this field his own ... This book's strengths are the authority of the author, the engaging writing style, the importance of the topics dealt with, and the up-to-date nature of the content.' Ian J. Deary, University of Edinburgh 'No one but James Flynn could have written this book. It contains his most recent ideas about the causes and implications of the massive rise in IQ test scores that has been termed the 'Flynn Effect', and is thus essential reading for anyone wishing to keep up to date with the latest thinking about the nature of IQ.' Nicholas Mackintosh, University of Cambridge 'The scholarship of this book is detailed and exhaustive. The originality of thinking is sprinkled throughout the beginning chapters, and reaches a peak in the final two. With his unique perspective, Flynn literally is 'opening new windows'.' Jonathan Wai, Duke University '... one of the most extraordinary science books I have ever read ... Flynn can confidently look forward to immortality. His name will forever be attached to one of the most contentious, baffling and, for me, exhilarating scientific discoveries of our age.' Brian Appleyard, The Sunday Times