...INCREASE OF ORGANISMS. — "There is no exception to the rule that every organic being, animal or plant, naturally increases at so high a rate that, if not...soon be covered by the progeny of a single pair." Man himself has doubled his numbers in the United States in the course of twenty-five years, and at...

...the actual increase, we shall see at once how very improbable it is that it will be often realised. "There is no exception to the rule that every organic...soon be covered by the progeny of a single pair." — (Origin of Species, p. 57.) But there is great virtue in that " if" : nor is this the only condition...

...intentions must have been subject to some sort of malignant interference. When therefore Mr. Darwin tells us that every organic being naturally increases at so high a rate that mutual slaughter is an absolutely indispensable part of the evolutionary process of creation, I do...

...which was suggested to Darwin by Malthus. Plants and animals tend to increase in a geometrical ratio. " Every organic being naturally increases at so high...soon be covered by the progeny of a single pair." The fifth link is the struggle for existence. The means of subsistence are limited. In this struggle...

...THEORY. Struggle for Ef.islciice. — All organic beings tend to increase with extreme rapidity, so that if not destroyed, the earth would soon be covered by the progeny of a single pair. This is evidenced not merely by calculation, but by actual observation of the extraordinary rapidity...

...Darwin, in his work on The Origin of Species, points this out with the greatest clearness. He says : " There is no exception to the rule that every organic...if not destroyed, the earth would soon be covered with the progeny of a single pair. Even slow-breeding man has doubled in twenty-five years ; and at...

...increasing, more or less rapidly, in numbers, all can not do so, for the world would not hold them. There is no exception to the rule that every organic...that if not destroyed the earth would soon be covered with the progeny of a single pair. Even slow-breeding man has doubled in twenty-five years, and, at...

...presented by the conclusion to which Darwin arrived in his "Origin of Species," that ''even slow breeding man has doubled in twentyfive years, and at this rate in less than one thousand years there would literally not be standing-room for his progeny." These words were written...

...but fitting that the great master should define his own terms : " There is no exception," he says, " to the rule that every organic being naturally increases...soon be covered by the progeny of a single pair." This is the ground-work of natural selection. What is the result? Away back in the animal kingdom began...

...plants which feed upon it. " Even slow-breeding man," says Darwin, " has doubled in twenty-five years. At this rate in less than a thousand years there would literally not be standing room for his progeny. The elephant is reckoned the slowest breeder of all known animals. It...