Contributions to the Theory of Natural Selection / A Series of Essays

Metadata

Gutenberg ID

22428

Title

Contributions to the Theory of Natural Selection / A Series of Essays

Language

en

Book source

Project Gutenberg

Description max 80 words

Alfred Russel Wallace presents a collection of essays exploring the mechanisms of natural selection, protective resemblance, mimicry, and the development of human races. This volume offers a foundational perspective on evolutionary theory, distinct from but contemporaneous with Charles Darwin's work, emphasizing the survival of the fittest through adaptation to environmental conditions.

Summary up to 500 words

In "Contributions to the Theory of Natural Selection," Alfred Russel Wallace presents a comprehensive argument for the mechanism driving the evolution of species. He posits that the abundance or rarity of any species is strictly determined by its adaptation to the conditions of existence, primarily the availability of food and safety from enemies. Wallace illustrates that while all animals possess the potential for rapid population growth, environmental checks ensure a stationary population where only the fittest survive. Within this struggle, useful variations that enhance an organism's ability to procure food or evade predators increase in frequency, while harmful variations diminish, eventually leading to the extinction of the original type or the emergence of a new species. Wallace dedicates significant attention to protective coloration and mimicry as evidence of this process. He details how animals, from moths resembling bird droppings to walking-stick insects that perfectly mimic twigs, have evolved specific traits to ensure survival. He argues that conspicuous colors are generally disadvantageous in nature, as they attract predators, whereas white or camouflaged varieties thrive when they provide concealment. These adaptations are not accidental but the result of a slow, cumulative process where slight variations are preserved if they offer a survival advantage. The collection also explores the "philosophy of birds' nests," suggesting that the construction of nests is an instinctive adaptation to environmental needs rather than a learned behavior in the traditional sense. Furthermore, Wallace addresses the development of human races under the law of natural selection. He acknowledges that while natural selection explains the divergence of animal species, its application to humanity is limited by the unique capacity for reason and moral sense. Despite his independent discovery of the principle of natural selection prior to Charles Darwin, Wallace graciously acknowledges Darwin's superior synthesis of facts and his monumental work, "The Origin of Species." Ultimately, the essays demonstrate that nature's harmony arises from a relentless process of modification where the fittest survive, shaping the organic world to fit the inorganic environment.

LLM editorial rating

4.2/5

Download URL

https://www.gutenberg.org/ebooks/22428.epub.noimages

Local file path

data/epubs/pg22428.epub

Removed after upload

Downloaded at

2026-07-02 16:30 UTC

Categories

• Essays
• Science