Table of Contents

Introduction

1 Variation Under Domestication
2 Variation in Nature
3 The Struggle for Existence
4 Natural Selection, or the Survival of the Fittest
5 Laws of Variation
6 Difficulties with the Theory
7 Miscellaneous Objections to the Theory of Natural Selection
8 Instinct
9 Hybridism
10 On the Imperfection of the Geological Record
11 On the Geological Succession of Organic Beings
12 Geographical Distribution
13 Geographical Distribution-Continued
14 Evidence for Mutual Affinities Among Organic Beings: Evidence From Morphology, Embryology, and Rudimentary Organs
15 Recapitulation and Conclusion

Appendix A: Other Books by Charles Darwin
Appendix B: People Referred to in These Chapters
Illustration Credits
Index

About the Author

Jan A. Pechenik is Professor of Marine Biology and Invertebrate Development at Tufts University. He is
the author of The Readable Darwin (2014), Biology of the Invertebrates (2014), A Short Guide to
Writing about Biology (2012), and more than 140 articles. From 1998 to 2001 and again from 2005 to 2008, he
served as Director of the Writing Across the Curriculum program at Tufts University.