This is the first full-scale interpretation of the life and work of the major American neuropsychologist Karl Lashley.

Preface; Acknowledgements; List of abbreviations; Introduction; 1. Lashley and Jennings: the origins of a hereditarian; 2. Lashley, Watson, and the meaning of behaviorism; 3. The pursuit of a neutral science; 4. Neuropsychology and hereditarianism; 5. Psychobiology and progressivism; 6. Psychobiology and its discontents: the Lashley-Herrick debate; 7. Hull and psychology as a social science; 8. Intelligence testing and thinking machines: the Lahley-Hull debate; 9. Pure psychology; 10. Public science and private life; 11. Genetics, race biology, and depoliticization; Epilogue: Lashley and American neuropsychology; Appendix: archives holding Lashley material; Bibliography; Index.