In the current era of rapid climate change, populations are facing environments in which
food availability can quickly decline or become highly unpredictable. These conditions may …

In size-structured groups, conflict over rank, resources or access to breeding opportunities is
expected to be greatest among individuals that are similar in size. We tested this general …

Theoretical models are often used to analyze reproductive conflicts in animal societies; for
example, by determining the different sex-allocation optima of queen and workers. But who …

Recent theory suggests that much of the wide variation in individual behavior that exists
within cooperative animal societies can be explained by variation in the future direct …

We used DNA fingerprinting to examine reproductive skew in cooperatively breeding white-
winged choughs, Corcorax melanorhamphos, which live in groups of up to 20 individuals …

Colonies of co‐operatively breeding African mole‐rats have traditionally been thought to be
composed of a single breeding female, one or two breeding males, and their offspring. In the …

The matrilineal Mosuo of southwestern China live in communal households where brothers
and sisters of three generations live together (duolocal residence), and men visit their wives …

The persistence of linear dominance hierarchies is often attributed to higher probabilities of
a win after a win or a loss after a loss in agonistic interactions, yet there has been no theory …

One of the hallmarks of human fairness is its insensitivity to power: although strong
individuals are often in a position to coerce weak individuals, fairness requires them to share …

Most social mammals residing in multimale–multifemale groups display some sort of
dominance hierarchy, although the stability and determinants of these hierarchies vary …