 A phylogeny is a reconstruction of evolutionary history. Thus the discovery of evolution is a good starting point for the history of phylogenetics. While Darwin was not the first to propose that some species were genealogically related to others, it was On The Origin of Species (Darwin 1859) that convinced many biologists to accept common ancestry and to start building phylogenies. One of the immediate—and ongoing—impacts was the question this raised in how phylogenies (i.e., reconstructions of evolutionary history) relate to taxonomies (i.e., how we group taxa).