Charles Darwin: The Origin of Species by means of Natural Selection

2. ON EXTINCTION. (continued)

Thus, as it seems to me, the manner in which single species and whole groups of species become extinct accords well with the theory of natural selection. We need not marvel at extinction; if we must marvel, let it be at our presumption in imagining for a moment that we understand the many complex contingencies on which the existence of each species depends. If we forget for an instant that each species tends to increase inordinately, and that some check is always in action, yet seldom perceived by us, the whole economy of nature will be utterly obscured. Whenever we can precisely say why this species is more abundant in individuals than that; why this species and not another can be naturalised in a given country; then, and not until then, we may justly feel surprise why we cannot account for the extinction of any particular species or group of species.

This is page 344 of 505. [Mark this Page]
Mark any page to add this title to Your Bookshelf. (0 / 10 books on shelf)
Customize text appearance:
Color: A A A A A   Font: Aa Aa   Size: 1 2 3 4 5   Defaults
(c) 2003-2012 and Michael Moncur. All rights reserved.
For information about public domain texts appearing here, read the copyright information and disclaimer.