The Mechanism of Inheritance 459 The A B C of Genetics 468 The Growth of the Individual 508 What Determines Sex 552 Variation of Species 576 Selection in Evolution 600 Is there a mystical Evolutionary Urge? 629 Book Five—The History and Adventures of Life The Prologue 644 Life Before Fossils 660 The Era of Crawling and Swimming 675 Life Conquers the Dry Land 701 The Full Conquest of the Land 738 The Modern Era 774 Man Dawns Upon the World 796 Book Six—The Spectacle of Life Habitats 823 Life in the Sea 839 Life in Fresh Water and on Land 878 Some Special Aspects of Life 922 The Science of Ecology 961 Life Under Control 1012 Book Seven—Health and Disease Infectious and Contagious Disease 1033 The Nourishment of the Body 1054 Fresh Air and Sunlight 1076 The Present Health of Homo Sapiens 1089 Book Eight—Behavior, Feeling, and Thought Rudiments of Behaviour 1102 How Insects and Other Invertebrates Behave 1147 The Evolution of Behaviour in Vertebrates 1200 Consciousness 1270 The Culminating Brain 1278 The Cortex at Work 1288 Human Behaviour and the Human Mind 1318 Modern Ideas of Conduct 1390 Borderland Science and the Question of Personal Survival 1411 Book Nine—Biology of the Human Race Peculiarities of the Species Homo Sapiens 1436 The Present Phase of Human Association 1454 Index 1481–1515 The pagination is that of the 1934 Literary Guild edition. References External links Online edition 1931 facsimile edition in Internet Archive 1930 non-fiction books Biology books Books by H. G. Wells Evolutionary biology literature Cassell (publisher) books 1930 in biology