The males tended to hang out together, and the females and children formed the core of the tribe. Or at least the center. It seemed to be closely analogous to how anthropologists believed that primitive humans were organized. In fact, the more I watched them, the more I realized how similar they were to primitive humanity. Was that because the environment naturally constrained behaviors, or was there something inevitable about the tribal structure? I hoped that we—the Bobs, that is—would eventually gather enough samples to form a theory. Even if it took millennia.