On the Origin of Species caused an uproar when it was first published in 1859. Darwin's theory was that species had evolved from simpler organisms by natural selection acting upon the variability of populations. This view was directly opposed to the doctrine of special creation by God and angered the Church and Victorian public opinion. This volume is a facsimile of one of the original copies sent to the eminent geologist Leonard Horner. The volume also includes sample pages from Darwin's origin