Origen De Las Especies

On the Origin of Species

Charles Darwin

'But with regard to the material world, we can at least go so far as this-- we can perceive that events are brought about not by insulatedinterpositions of Divine power, exerted in each particular case, but by the establishment of general laws.' W. Whewell: Bridgewater Treatise.

'To conclude, therefore, let no man out of a weak conceit ofsobriety, or an ill-applied moderation, think or maintain, that a man can search too far or be too well studied in the book of God's word, or in the book of God's works; divinity or philosophy; but ratherlet men endeavour an endless progress or proficience in both.' Bacon: Advancement of Learning.

Down, Bromley, Kent, October 1st, 1859.

On the Origin of Species by Means of Natural Selection,or the Preservation of Favoured Races in the Struggle for Life.
By Charles Darwin

Introduction Chapter I Variation under Domestication

Causes of Variability -- Effects of Habit --Correlation of Growth -- Inheritance -- Character of Domestic Varieties -- Difficulty of distinguishing between Varieties and Species -- Origin of Domestic Varieties from one or more Species -- DomesticPigeons, their Differences and Origin -Principle of Selection anciently followed, its Effects -- Methodical and Unconscious Selection -Unknown Origin of our Domestic Productions -- Circumstancesfavourable to Man's power of Selection.

Chapter II

Variation under Nature

Variability -- Individual Differences -- Doubtful species -- Wide ranging, much diffused, and common species vary most --Species of the larger genera in any country vary more than the species of the smaller genera -- Many of the species of the larger genera resemble varieties in being very closely, but unequally, relatedto each other, and in having restricted ranges.

Chapter III

Struggle for Existence

Bears on natural selection -- The term used in a wide sense -- Geometrical powers of increase -Rapid...