The Selfish Gene

Citation

Dawkins, R. (2006). The Selfish Gene (30th anniversary ed.). Oxford University Press. (First published 1976.)

Chapter Summary

The book was first published in 1976 in eleven chapters. A second edition in 1989 added two chapters and substantial endnotes reflecting Dawkins's later book The Extended Phenotype. The 30th-anniversary edition (2006, 360 pages) keeps all of this, adds a new introduction by the author and restores the original foreword by Robert Trivers, with the chapter list below.

Chapter 1: Why Are People?

The opening chapter begins with Darwin, whose theory of natural selection explained, for the first time, why living organisms exist. Dawkins then sets out the question of the reason for our existence that the rest of the book pursues from the point of view of the gene.

Chapter 2: The Replicators

Dawkins introduces the replicator, a molecule that copies itself, and considers how the first replicators arose in the primordial soup and became more complex. They eventually built cells and bodies as "survival machines".

Chapter 3: Immortal Coils

The chapter turns to DNA, its helical structure, chromosomes, Mendel's laws and recombination in meiosis. Individual genes are compared to rowers in a boat who must work together, and the success of each gene depends on the environment formed by the others. It also raises Medawar's idea of ageing and the evolution of sex.

Chapter 4: The Gene Machine

How genes influence behaviour. Genes that program bodies to behave in ways that help them be passed on will be selected, and the chapter gives examples.

Chapter 5: Aggression: Stability and the Selfish Machine

Dawkins introduces John Maynard Smith's evolutionarily stable strategy through the hawk-dove game, showing that evolution does not work for the good of the species and how a stable mixture of strategies can arise.

Chapters 6–8: Genesmanship; Family Planning; Battle of the Generations

Chapter 6 presents kin selection: close relatives share genes with a higher probability, so altruism towards them can spread, a point developed by Fisher, Haldane and above all W. D. Hamilton. Chapter 7 discusses David Lack's account of how clutch size is adjusted to limited resources. Chapter 8 discusses Robert Trivers's concept of parental investment and the conflicts between parents and offspring.

Chapters 9–10: Battle of the Sexes; You Scratch My Back, I'll Ride on Yours

Chapter 9 discusses sexual selection, female choice and Fisher's explanation of the equal sex ratio. Chapter 10 discusses reciprocal altruism, honest signalling, group living and the selfish herd, and altruism among social insects.

Chapter 11: Memes: The New Replicators

Dawkins proposes that cultural evolution is analogous to biological evolution, and that units of cultural information propagate themselves like genes. He coins the word "meme" for the new replicator.

Chapters 12–13: Nice Guys Finish First; The Long Reach of the Gene

The two chapters added in the second edition. The title of the first points to the evolution of cooperation; the second concerns the reach of the gene's influence, a theme developed in The Extended Phenotype. The edition ends with endnotes, extracts from reviews, a bibliography and an index.

Key Concepts

Chapters 1–5

• Replicator: an entity that makes copies of itself, the starting point of the argument.
• Survival machine: the body as a vehicle built by genes.
• Evolutionarily stable strategy: a strategy that cannot be bettered once most of a population adopts it.

Chapters 6–11

• Kin selection: why relatives' shared genes favour altruism between them.
• Parental investment: the cost to parents of each offspring, and the resulting conflicts.
• Reciprocal altruism: cooperation among non-relatives.
• Meme: the unit of cultural transmission.

Critical Analysis

Strengths

• A single clear argument. The chapters build from replicators to bodies, behaviour, conflict and culture, and each chapter restates the gene's-eye view in a new domain.
• Writing for non-specialists. Maynard Smith observed that it was written as a popular account and still made an original contribution to biology, and other commentators such as Medawar and Hamilton praised its skill.
• Concrete examples. Chapter summaries show worked cases such as the hawk-dove game, Fisher's sex ratio argument and the elephant seal.

Limitations

• Metaphor-heavy. Critics, such as the psychologist Nicky Hayes, argue that the book rests heavily on metaphors drawn from animal behaviour and seeks confirming examples.
• Contested simplification. The ecologist Arthur Cain called it a "young man's book" in 1976, and others argue that it oversimplifies the relationship between genes and organisms.
• Dated science. The core text was written in 1976, and later chapters and endnotes add material from the 1980s; a reader needs more recent texts for the genetics and behavioural ecology developed since.

Where It Fits in the Course

The book is one of two biology titles on the further-reading shelf, the other being On Growth and Form. The two answer the question of why organisms look and behave as they do in opposite ways: Dawkins starts from genes and natural selection, and Thompson from physics and geometry. The rest of the shelf comes from other fields. It also complements the genetics and molecular biology books by supplying an evolutionary reading of the genes they describe.

How to Use This Book

It is written for general readers and needs no technical background beyond secondary-school biology. Read Chapters 1–3 for the premise, 5–6 for the main ideas of stable strategies and kin selection, and 11 for memes; the rest can be taken in any order. Read the endnotes and the 30th-anniversary introduction, where Dawkins responds to criticism and refines points, and pair the book with a modern evolution or behavioural ecology text to see what has been tested since 1976.