By mid-December, Darwin saw a similarity between farmers picking the best stock in selective breeding, and a Malthusian Nature selecting from chance variants so that "every part of newly acquired structure is fully practical and perfected", thinking this comparison "a beautiful part of my theory".
By mid-December, Darwin noticed a resemblance between farmers choosing the finest livestock in selective breeding and Malthusian Nature selecting from random variations so that "every part of newly acquired structure is fully practical and perfected", considering this comparison "a beautiful aspect of my theory".