Comparative studies of social insects and birds show that the evolution of cooperative and
eusocial breeding systems has been confined to species where females mate completely or …

Male mammals often kill conspecific offspring. The benefits of such infanticide to males, and
its costs to females, probably vary across mammalian social and mating systems. We used …

The evolution of social monogamy has intrigued biologists for over a century. Here, we
show that the ancestral condition for all mammalian groups is of solitary individuals and that …

Studies of eusocial invertebrates regard complex societies as those where there is a clear
division of labour and extensive cooperation between breeders and helpers. In contrast, …

Animal cognition experiments frequently reveal striking individual variation but rarely consider
its causes and largely ignore its potential consequences. Studies often focus on a subset …

In most social mammals, some females disperse from their natal group while others remain
and breed there throughout their lives but, in a few, females typically disperse after …

Although kin-selection theory has been widely used to explain the tendency of individuals to
bias beneficial behaviors towards relatives living within the same social group [1], less …

Chimpanzees live in large groups featuring remarkable levels of gregariousness and cooperation
among the males. Because males stay in their natal communities their entire lives and …

The attrition of women in academic careers is a major concern, particularly in Science,
Technology, Engineering, and Mathematics subjects. One factor that can contribute to the attrition …

Cooperative breeding systems, in which non-breeding individuals provide care for the offspring
of dominant group members, occur in less than 1% of mammals and are associated with …