...and abstracted, including whole series of Journals and Transactions, I am surprised at my industry. I soon perceived that selection was the keystone of...species. Here then I had at last got a theory by which to work ; but I was so anxious to avoid prejudice, that I determined not for some time to write even the...

...and abstracted, including whole 'series of Journals and Transactions, I am surprised at my industry. I soon perceived that selection was the keystone of...species. Here then I had at last got a theory by which to work ; but I was so anxious to avoid prejudice, that I determined not for some time to write even the...

...and abstracted, including whole series of Journals and Transactions, I am surprised at my industry. I soon perceived that selection was the keystone of...species. Here then I had at last got a theory by which to work ; but I was so anxious to avoid prejudice, that I determined not for some time to write even the...

...and abstracted, including whole series of Journals and Transactions, I am surprised at my industry. I soon perceived that selection was the keystone of...species. Here then I had at last got a theory by which to work ; . but I was so anxious to avoid prejudice, that I determined not for some time to write even...

...living in a state of nature remained for some time a mystery to me. In October 1838, that is, f1fteen months after I had begun my systematic enquiry, I...species. Here then I had at last got a theory by which to work ; but I was so anxious to avoid prejudice, that I determined not for some time to write even the...

...everybody's hand, says : " In October, 1838, that is, fifteen months after I had begun my systematic inquiry, I happened to read, for amusement, ' Malthus on Population...Here, then, I had at last got a theory by which to work ; but I was so anxious to avoid * LETTERS OF DAVID RICARDO TO THOMAS ROBERT MALTHUS : 1810-1823....

...prepared to appreciate the struggle for existence which everywhere goes on from longcontinued observations of the habits of animals and plants, it at once struck...Here, then, I had at last got a theory by which to work." (Now that it is very generally recognised that this struggle for existence, with survival of...

...struggle for existence which everywhere goes on from longcontinued observation of the habits of aniixals and plants, it at once struck me that under these...Here, then, I had at last got a theory by which to work ; but I was so anxious to avoid prejudice, that I determined not for some time lo write even the...

...to appreciate the struggle for existence which everywhere goes on from long-continued observations of the habits of animals and plants, it at once struck...Here, then, I had at last got a theory by which to work ; but I was so anxious to avoid prejudice that I determined not for some time to write even the...

...long-continued observation of the habits of animals and plants, it at once struck me that under . . . circumstances favourable variations would tend to...result of this would be the formation of new Species. But at that time I overlooked one problem of great importance. . . . This is the tendency in organic...