Contents xv 



PAGE 



6. Tests of Truth in the External World ...... 250 



7. Selection of Ideas by Attention 252 



8. Attention Variations and the Environment of Thought. . . 256 



9. What constitutes Fitness in the External World ? , , 258 



10. The Fitness of Ideas; the Social Environment .... 260 



ii. Summary 264 



12. Some Fragmentary Interpretations 266 



CHAPTER XVIII 

 THE ORIGIN OF A 'THING' AND ITS NATURE 



i. What is a ' Thing ' 269 



2. A 'Thing' is Behaviour; the 'What ' and the 'How' . . .271 



3. The ' What ' and the ' How ' of Mind 273 



4. The ' Prospective ' and the ' Retrospective ' 275 



5. Probability and Design 277 



6. Design is Genetic 279 



7. The Natural History of the Categories 281 



8. The ' Intuition ' View 285 



9. The Meaning of the Category of Causation 288 



10. Definition of ' Origin '......... 291 



11. What is ' Potentiality '? 293 



12, The Origin of the Universe; Further Problems .... 298 



CHAPTER XIX 



THE THEORY OF GENETIC MODES 



i. Agenetic Science 300 



2. The First Postulate of the Theory of Genetic Modes . . . 302 



3. Genetic Modes 305 



4. Genetic Science 308 



5. The Second Postulate of the Theory of Genetic Modes . . 311 



6. History a Genetic Science . . . . . . . .313 



7. The Biological Theory of History . . . . . . 315 



8. The Axioms of Genetic Science ....... 322 



9. Vital Phenomena and the Theory of Genetic Modes . . . 324 



10. Theories of Life : Mechanical and Vitalistic .... 327 



ii. Other Applications 331 



