The Origin of Species Chapter 1 Part 1 - Variation Under Domestication

In which the myriad variations observed in domesticated plants and animals are attentively examined, revealing how conditions of life, use and disuse of parts, and inheritance weave together to produce diverse and often singular forms. The study of domestic pigeons, in particular, unfolds as a remarkable example of how selection, both methodical and unconscious, shapes races so distinct that they might easily be mistaken for separate species, yet all traceable to a common wild progenitor.