 This entanglement with other sciences makes phylogenetics a rich source for philosophers of science. It provides a model to better understand how science works when specialized fields inform and rely on each other. Philosophers might draw on phylogenetics to better understand the social structure of complexes of sciences (Longino 1990, 2019) (and complex sciences that draw on other fields), or to characterize what constitutes good scientific activity for what might be called “service sciences”, i.e., sciences whose products are largely used by other scientists as end-users.