Friendship is the single most important factor influencing our health, well-being, and
happiness. Creating and maintaining friendships is, however, extremely costly, in terms of …

The question as to why primates have evolved unusually large brains has received much
attention, with many alternative proposals all supported by evidence. We review the main …

The impact of the Internet across multiple aspects of modern society is clear. However, the
influence that it may have on our brain structure and functioning remains a central topic of …

Social integration and support can have profound effects on human survival. The extent of
this phenomenon in non-human animals is largely unknown, but such knowledge is …

Within-group variation in sociality has been linked to correlates of fitness across vertebrates.
Individuals that form strong social bonds with a few partners, or are well integrated into a …

The human social world is orders of magnitude smaller than our highly urbanized world
might lead us to suppose. In addition, human social networks have a very distinct fractal …

Several recent studies show that animal friendships, like human friendships, are durable
and have fitness benefits by increasing survival, infant survival, or reproductive success …

The Primate Origins of Human Nature (Volume 3 in The Foundations of Human Biology
series) blends several elements from evolutionary biology as applied to primate behavioral …

Compared to most other mammals and birds, anthropoid primates have unusually complex
societies characterised by bonded social groups. Among primates, this effect is …

Many species exhibit fission–fusion dynamics, yet the factors that influence the frequent
changes in group size and membership in these species have not been widely studied …