Looking at animals in order to understand exclusively human properties seems counter-intuitive. Nevertheless, there are at least two ways to do so. However, rather then refining our knowledge on these properties per se, looking at animals can complement this knowledge by informing us about the evolutionary origins of exclusively human properties. Besides the traditional comparative approach, a second way consists of identifying general principles and regularities between the occurrence of environmental constellations and reliably associated consequences in animals which also might have had an impact for human evolution. The present chapter was an attempt to exemplify this second approach using the case of cooperative breeding.