" For years, female-female aggression among primates was ignored or minimized. According to the anthropologist Sarah Blaffer Hrdy, this occurred partly because male-male competition was even more “startling and overt,” but also because “persistent conflicts between females are often more subtle . . . [the] competition is indirect. Two animals who are not even touching or looking at one another may nevertheless be in competition if one of them occupies a place or consumes a resource that would benefit the other. "

― Phyllis Chesler , Woman's Inhumanity to Woman