 Problematic choice of comparison species. The data one can gather and the conclusions one can draw about human behavioral evolution from non-human primates are highly dependent on the primate species to which one attends. For example, in mid-20th century primatology researchers chose species for study, such as savanna baboons, which had social structures that seemed similar to humans. In the 1970's feminist primatologists were instrumental in convincing the scientific community that chimpanzees were a more appropriate species for modeling key transitions in human evolution. This switch in model organism was supported by molecular phylogenetic, comparative anatomical, and paleontological data, but it was also a strategic feminist move, as chimpanzees are matrifocal creatures with complex social lives. This facilitated a research focus on mothering, which was consistent with the focus on maternal thinking and social motherhood in that period of western feminism (Haraway 1989). There are at least two kinds of recommendations that arise here. First, if one is focusing on removing bias, then one should take care not to falsely generalize across the diversity that can be found among primate species (Hrdy 1986). Second, one needs to take responsibility for one's choice of model organism, because it will have an impact on the kinds of knowledge that one can produce (Haraway 1989).