Charles Darwin. "The deciphering of the notebooks and letters has been an exquisite labor for many distinguished scholars over the past century, and a great deal of effort has been expended on reconstructing the chronology of these writings in search of key junctures and influential events. A whole intellectual cottage industry has sprung up to interpret Darwin's writings, to probe his psyche and to explain many curious aspects of his life (most notably why he waited more than 20 years to publish his ideas on evolution and natural selection)."

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