Intense sociality has been a catalyst for human culture and civilization, and our social
relationships at a personal level play a pivotal role in our health and well-being. These …

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 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 …

In the songs and bubble feeding of humpback whales; in young killer whales learning to
knock a seal from an ice floe in the same way their mother does; and in the use of sea …

The social brain hypothesis has suggested that natural social network sizes may have a
characteristic size in humans. This is determined in part by cognitive constraints and in part …

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 'social complexity hypothesis' for communication posits that groups with complex social
systems require more complex communicative systems to regulate interactions and relations …

The scientific study of networks-computer, social, and biological-has received an enormous
amount of interest in recent years. However, the network approach has been applied to the …

Psychological studies of relationships tend to focus on specific types of close personal
relationships (romantic, parent–offspring, friendship) and examine characteristics of both the …

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 …