The social environment is both an important agent of selection for most organisms, and an
emergent property of their interactions. As an aggregation of interactions among members of …

In the context of social evolution, the ecological drivers of selection are the phenotypes of
other individuals. The social environment can thus evolve, potentially changing the adaptive …

When the notion of climate change emerged over 200 years ago, few speculated as to the
impact of rising atmospheric temperatures on biological life. Tens of decades later, research …

One of the outstanding questions in evolutionary biology is the extent to which mutually
beneficial interactions and kin selection can facilitate the evolution of cooperation by …

Long‐term studies of wild animals provide the opportunity to investigate how phenotypic
plasticity is used to cope with environmental fluctuations and how the relationships between …

Individual differences in social behaviour can result in fine-scale variation in spatial
distribution and, hence, in the social environment experienced. Given the expected fitness …

Evolutionary endocrinology aims to understand how natural selection shapes endocrine
systems and the degree to which endocrine systems themselves can induce phenotypic …

Both individual and group behavior can influence individual fitness, but multilevel selection
is rarely quantified on social behaviors. Social networks provide a unique opportunity to …

Early-life adversity, even when transient, can have lasting effects on individual phenotypes
and reduce lifespan across species. If these effects can be mitigated by a high-quality later …

Highlights•Wild squirrels are adapted for a diversity of complex food-hoarding
economies.•Economic decisions in apparently solitary species are driven by social …