Publication of Darwin's Theory - Asa Gray and The Young Guard

Asa Gray and The Young Guard

Others helped with providing information, including Asa Gray on American plants. Darwin wrote to Gray saying that after 19 years of work on the question of whether species "have descended from other species, like varieties from one species" and "that species arise like our domestic varieties with much extinction", he had "come to the heteredox conclusion that there are no such things as independently created species – that species are only strongly defined varieties. I know that this will make you despise me. – I do not much underrate the many huge difficulties on this view, but yet it seems to me to explain too much, otherwise inexplicable, to be false." An intrigued Gray admitted to his own notion that there was some law or power inherent in plants making varieties appear, and asked if Darwin was finding this law. Realising that Gray had not grasped what he was suggesting, Darwin sent him a letter on 5 September 1857 outlining the difficulties involved. He enclosed a brief but detailed abstract of his ideas on natural selection and divergence, copied out by the schoolmaster to make it more legible.

Gray responded, questioning his use of the term "natural selection" as an agent. In his reply Darwin said that he had to use this shorthand to save incessantly having to expand it into a formula such as "the tendency to the preservation (owing to the severe struggle for life to which all organic beings at some time or generation are exposed) of any the slightest variation in any part, which is of the slightest use or favourable to the life of the individual which has thus varied; together with the tendency to its inheritance". He asked Gray to maintain secrecy. The young guard of naturalists were now putting the "mode of creation" openly on the agenda, even in addresses to the Geological Society, but Darwin wanted his case to be fully prepared.

Joseph Dalton Hooker, John Tyndall and Thomas Huxley now formed a group of young naturalists holding Darwin in high regard, basing themselves in the Linnean Society of London which had just moved to Burlington House, Piccadilly, London, near the Royal Society. Huxley had not yet understood natural selection despite Darwin's hints about pedigree and genealogical trees. Huxley's attention was focussed on defeating the dominant orthodoxy of the arrogant Owen.

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