iv CONTENTS 



LECTURE XIV. 



PAGE 



DIRECTIVE FACTORS IN EVOLUTION: SELECTION . . 439 



1. Selection the Central Idea in Darwinism, 439 2. Logi- 

 cal Objections to Darwinism, 440 3. Sentimental Recoil 

 from Darwinism, 441 4. Changes in Selection Theory since 

 Darwin's Day, 443 5. Scientific Critique of Selection 

 Theory, 451 6. Subtlety of Selection Theory, 454 7. 

 Sexual Selection, 456 8. Selection, 466 9. Selectionist 

 Interpretations and the Argument from Design, 468. 



LECTURE XV. 



THE INDIVIDUAL AND THE RACE: HEREDITY . . .477 



1. Definition of Heredity, Inheritance, Nurture, Develop- 

 ment, 478 2. Heredity a Condition of Evolution, 480 

 3. Modifications and Heredity, 483 4. The Organism as 

 a Historic Being, 484 5. Nature and Nurture, 494 6. 

 The Other Side of Heredity, 495 7. Heredity and Per- 

 sonality, 498. 



LECTURE XVI. 



THE EVOLUTION OF MIND AND MIND IN EVOLUTION . . 507 



l.Of the Fact of the Evolution of Behaviour There Is No 

 Doubt, 507 2. Difficulty of Understanding the Process, 

 508 3. Provisional Sketch of the Evolution of Behaviour, 

 510 4. The Efficiency of Mind in Everyday Life, 520 

 5. The Evolutionary Efficiency of Mind, 525. 



LECTURE XVII. 



NATURE CROWNED IN MAN 545 



1. Differentiation and Integration as Standards of Progress, 

 545 2. The Probable Phylogeny of Man, 546 3. Man's 

 Solidarity with the Primate Stock, 551 4. Man's Unique 

 Position, 552 5. Factors in the Ascent of Man, 556 6. 

 Human Evolution Contrasted with Animal Evolution, 559 

 7. In What Sense May It Be Said that Nature Is Crowned 

 in Man?, 565. 



LECTURE XVIII. 



DISHARMONIES AND OTHER SHADOWS 573 



1. Difficulties in the Way of a Religious Interpretation of 

 Animate Nature, 573 2. Extinction of Highly Specialised 

 Types, 574 3. Imperfect Adaptations, 575 4. Disease, 

 576 5. Parasitism, 578 6. Cruelty of Nature, 585 

 7. Senescence and Death, 589 8. Apparent Wastefulness, 

 594 9. A Balanced View, 596. 



