...his law of "natural selection" by reading the economic writings of Thomas Robert Malthus. He says : In October, 1838, that is, fifteen months after I...struggle for existence which everywhere goes on, from long continued observations of the habits of animals and plants, it at once struck me that under these...

...pestilence, and famine, which tend to keep population within fixed limits. Being well prepared, as he said, to appreciate the struggle for existence which everywhere goes on, from long-continued observation of the habits of animals and plants, it at once struck him that under these circumstances...

...kinds of facts " — about species and varieties. In October, 1838, he read " Malthus on Population." " Being well prepared to appreciate the struggle for existence which everywhere goes on from long continued observation of the habits of animals and plants, it at once struck me that under these...

...quadrupeds, be let to grow, the more vigorous plants gradually 1 In October 1838," says Darwin, that is, 15 months after I had begun my systematic inquiry, I...existence which everywhere goes on from long-continued observation of the habits of animals and plants, it at once struck me that under these circumstances...

...thus describes: "In October, 1838, that is, fifteen months after I had begun my systematic enquiry, I happened to read for amusement 'Malthus on Population,'...existence which everywhere goes on from long-continued observation of the habits of animals and plants, it at once struck me that under these circumstances...

...thus describes: "In October, 1838, that is, fifteen months after I had begun my systematic enquiry, I happened to read for amusement ' Malthus on Population,...existence which everywhere goes on from long-continued observation of the habits of animals and plants, it at once struck me that under these circumstances...

...this mystery was suggested to him by reading Malthus' famous essay on Population. In his own words: "Being well prepared to appreciate the struggle for existence which everywhere goes on from long continued observation of the habits of animals and plants, it at once struck me that under these...

...evidently many must perish for every one that lives. 1"In October 1838," says Darwin, "that is, 15 months after I had begun my systematic inquiry, I...existence which everywhere goes on from long-continued observation of the habits of animals and plants, it at once struck me that under these circumstances...

...though fully grown plants; 1 "In October, 1838," says Darwin, "that is, fifteen months after I bad began my systematic inquiry, I happened to read for amusement...existence which everywhere goes on from long-continued observation of the habits of animals and plants, it at once struck me that under these circumstances...

...by his happening " to read for amusement Malthus On Population." ' "Being well prepared," he writes, "to appreciate the struggle for existence which everywhere goes on from long-continued observation of the habits of plants and animals, it at once struck me that, under these circumstances,...