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On the Origin of Species

On the Origin of Species is about Natural Selection and Survival of the Fittest

Variation under Domestication

Chapter 1

The Influence of Habit

Chapter 1b

Reverting to the Wild State

Chapter 1c

The Breeds of the Domestic Pigeon

Chapter 1d

Selection

Chapter 1e

Unconscious Verus Methodical Selection

Chapter 1f

Variation under Domestication

Chapter 1g

Variation Under Nature

Chapter 2

Species Versus Variety

Chapter 2b

Incipient Species

Chapter 2c

The Principle of Divergence of Character

Chapter 2d

Struggle for Existence

Chapter 3

The Geometric Increase in Population

Chapter 3b

Epidemics as a Check

Chapter 3c

Other Species as a Check

Chapter 3d

Competitive Advantages

Chapter 3e

Natural Selection

Chapter 4

Sexual Selection

Chapter 4b

The Action of Natural Selection

Chapter 4c

The Intercrossing of Individuals

Chapter 4d

Isolation and Elevation

Chapter 4e

Extinction

Chapter 4f

Naturalization

Chapter 4g

Summary of Chapter

Chapter 4h